NOTES: I wanted to bring as many DCTV together as I could in this story. I didn't want to just drop characters randomly, so I though about a few ways of making them all have some sort of connection, or to connect and also make them interact in a meaningful way. In this version here for example, Supergirl from Earth Titans is dead. Also, in this story, Krypton (the past story we saw on the show) happens on Earth 38 (minus Seg being Zod's father), here, Seg and Nyssa are Kara and Clark's grandparents. I like using canon a lot, as much as I can (all the backstory from shows and comics situations are canon) but sometimes I add some twists to connect it all.

Enjoy.

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EARTH 19

Oliver walked around the living room while the others prepared to train. Since they were from different worlds with different experiences, Oliver thought it was a good idea for them to have a chance on winning fast so they could go back to his Earth and deal with the multiverse problem. He was lost in his thoughts, looking at a bird at the window when he heard a noise behind him and turned around.

- It's everything ok? – Kara asked while approaching Oliver.

- I think so...

- You don't look ok...

- It's just... I want to get this Slade 2.0 thing over with soon enough so we can deal with our bigger problem.

- I know. And I understand. You have to believe everything will be ok.

- Will be?

- Oliver...

Kara looked at him trying to figure it out a few things. She knew he was a difficult person to read and never let his feelings show, but now, she felt like he was starting to, but not enough.

- I feel like this is it... This is the defining moment of all our lives. We had big problems before, and had to team up before, but we had nothing like this before. Having to go to different Earths and recruit as many people as possible. This guy, Monitor, he's powerful. Beyond anything I have ever seen before and... An evil version of him, I just can't see this ending well... I just have a weird feeling about it.

- I know this is huge. I have seen a lot, and nothing like the Monitor, so yes I believe this will be hard and dangerous but... We have to believe that coming together with everyone like this will pay off. We have to believe we can deal with it. I believe we do.

- I don't know how you manage to stay positive even with a threat like that coming our way – Oliver gave her a tiny, but weak smile.

- I just try to believe the best of people and situations, so many are relying on us, so many relies on me every day. If I think in a negative way, I allow bad feelings to take over me, and feeling like that, I can't just give the best of me and the people deserve the best.

Oliver stared at Kara, thinking about what she said. There was so many times in his life he thought there was no other way and that things wouldn't end well. He almost gave up fighting when Dark Archer almost killed him 7 years ago. He almost gave himself in to Slade after his mom was killed, He almost died at the hands of Ra's, he almost lost hope when Dhark killed Laurel, he let Prometheus break him to the point he lost faith in himself, he almost lost everything on the hands of Diaz, his own sister tried to kill him so many times and he had no idea they were related. So many times darkness took over him and it did no good at all. He knew that, he knew Kara was right. Every time he had lost faith, something bad happened so maybe it was time to change things. It was going to be hard, it wasn't something he was used to, but he would try. Kara inspired him a lot and he was grateful she was helping him on this difficult journey.

- Thank you for coming with me.

- You know I would never let you do this all by yourself. – She blushed.

Silence came over them as they both stared at each other. There were so many things they had to talk about, deal with. They both knew it.

- We are literally facing the threat of the end of the multiverse... - Kara said as she reached for his hand. – We need to talk.

- I rather do something else... - Oliver reached for her cheeks, bringing her face closer to his.

Kara gave into the kiss, feeling like she had to agree with him. Maybe they didn't need to have a conversation; she could see in his eyes, she could feel in his kiss what he felt. She was willing to show the same want and passion he was showing her, she didn't want to waste time; she didn't want to regret wasting her time later.

- We might win this, but there's a possibility we won't. – Oliver whispered as their foreheads touched. – I don't want to regret not kissing you when I should have.

- Me neither.

Kara smiled, with one of her hands on his neck, bringing him closer to another passionate kiss.

- Hum... I'm sorry to interrupt...We're ready! – Garr said as he transformed from a bird to human again.

- Hey, you were there this whole time? – Oliver looked incredulously to Garr.

- I'm sorry; you guys are just too cute... But yes. – He gave him a wide smile – Shall we?

EARTH 21

Kal and Robin arrived at the Wayne Mansion that afternoon under red skies. Robin reached the ground and looked up, feeling chills down his spine.

- Lucky you I'm used to it. I'm old for that kind of emotions – Robin said trying to make Kal smile.

Kal didn't say a word and was welcomed by Alfred.

- They are on the library. – Alfred said, closing the door after them.

- Thank you, Alfred – Kal nodded and walked away, being followed by Robin.

As soon as they got to the library, Bruce was sat on his chair, with a guy with a cape standing next to him.

- Thank you for coming - he said – I'm the Monitor.

- Robin told me a few things on our way here. How can we help?

- For now, all you need is to follow me. I'm gathering everyone at one place to make things easier. – He said.

- Things are ugly out there Kal. – Bruce said. – It's up to us now to help. The three of us.

- Ok. – Kal nodded, still with a sad look on his face.

Bruce knew his friend was having the worst time of his life. Their biggest enemy had caused the death of the love of his life, his family. Kal was destroyed. Maybe this world ending situation would motivate him again and maybe he could see that there was still hope even in the darkness. He knew it, he had been there. He saw his parents being murdered, so he understood his friend's pain. He found his way back and he only had hopes that Kal would find it too.

- Alfred, please take care of things while I'm away... You know who to call if there's any trouble.

- Yes Master Bruce, I know. Please be safe. The three of you.

- We will be.

They followed The Monitor through something that looked like a portal and vanished from Alfred's sight.

EARTH 15

MANY YEARS AGO

He had to do it. He had to see it.

Their colleagues called him a lunatic, that he needed to stop, but how could he? For many years, humans had studied dinosaurs, the Moon, other planets and so many other mysteries of the universe. How it was possible that no one could ever have thought about studying the creation of the universe? There were so many theories, but nothing they could actually prove. If he managed it, he would be the first person, the first scientist to actually teach the world how the universe came to be.

After years of studying it, and asking for permission of his bosses, he found out a way. And no one would stop him. He got to his lab when the building was completely empty, only with a few security guards outside. They all knew him but were unaware of his plans, so they didn't stop him.

Pariah closed the door of his lab and started the whole process. He built a small machine in secret that was going to be capable of huge things if it worked. And he hoped it would. He turned it on and prepared the room for his experiment. The machine opened up something similar like a window as soon as he turned it on. He pressed a few buttons, regulated it and the window went all black. It was like he was watching TV, but nothing appeared on screen. He felt frustration taking over him, until there was a bright spot on the corner of the window.

Pariah watched it as it became bigger, like a hole opening among all that emptiness. Suddenly, a hand or something like it came through this hole and opened up. Small dots of light spread through the window and Pariah smiled.

YES! He thought. It was happening.

The creation of the universe was happening before his eyes, and it was beautiful.

He could see the dots of light transforming into planets one by one, and the Sun, the Moon and the stars. He still couldn't believe this experiment was working until the window started trembling. It looked like an earthquake was happening but only there. Pariah felt desperate, he had no idea what was going on.

- This can't be happening! It was working! – He said as he tried to figure it out what went wrong.

A huge explosion happened and Pariah closed his eyes, knowing he was going to die. Except something happened and when he opened his eyes, he noticed he was in a different place and there was a guy wearing funny clothes and a huge cape.

- You... Where am I?

- You're in my satellite. I just saved you.

- What? I don't understand...

- You made a terrible mistake, Pariah!

- My experiment?

Pariah looked desperate at the unknown guy. He could feel something bad came from what he did.

- Your Earth is destroyed; you are the only survivor.

- WHAT? How? I... I did this?

- You were told not to do it, and you insisted. Now a great evil is unleashed and worlds are in danger. My evil counterpart was released from his prison and for what you did, you will be forever doomed.

Pariah felt desperation take over him. He felt like he was being transported through the air, trying to understand what the hell was going on. He found himself in another place, and saw the skies becoming red. He walked around alone, trying to find out more about where he was. A huge storm started hours later and a huge white wall seemed to be destroying everything it touched, turning it all to dust. People were running and screaming around and turning into dust seconds later.

Pariah felt the need to help them, but it was useless. He felt that familiar pull again and saw himself in a different place once again.

And it all happened again.

And again.

And again.

And again.

He finally understood his punishment.

And he yelled in agony.

EARTH 38

Jefferson, Anyssa and Jennifer were all suited up, looking around for any clues about what was going on. It felt weird, the skies were red and everything seemed to be darker. It was like a storm was about to hit town. They felt a strong wind towards their direction and suddenly, a portal opened before their eyes.

- WHAT THE HELL? – Anyssa yelled, trying to see what was happening.

- Stay behind me! – Jefferson warned his daughters.

The Monitor appeared through the portal, explaining the multiverse needed them. Jennifer looked at her sister and her dad and started laughing.

- I'm sorry, I'm supposed to believe there are multiple Earths out there and this storm is because the freaking world is ending? Hell no! You're crazy, sir.

- I'm serious! – He said looking at her.

In a blink of an eye, they were all in a weird place that looked like a spaceship. Anyssa looked around, feeling suspicious.

- Where are we?

- In space, of course. – Monitor said as he pointed the window in front of them. – This is where I monitor the multiverse.

- Did you kidnap us? – Jennifer looked scared at him and curious at the same time.

- No. I just need your help.

He showed them a screen with many different Earths being destroyed, people running, becoming dust, a white wall erasing every form of life it could touch. The three of them looked horrified at the screens.

- What do you need from us? I believe you! – Jefferson said as he looked at the Monitor. That was the worst thing he has ever seen in his entire life. If that guy needed them, if this multiverse existed and needed his help, his family's help, they would be there.

EARTH 19

After a lot of training and a lot of time planning, it was finally time to face Slade. The plan was to make him come after them and kick his ass, like Dick would say. Oliver just hoped that worked.

- And what do we do afterwards? He escaped once, he can escape again... - Dawn said, looking worried at Dick.

- Well... There's something I can do to help. – Oliver said thinking about it really fast and having, maybe the worst idea ever, but he could see no other way. – I still have my island prison in my Earth and it did hold our Slade.

- Bring him to your Earth? To your Earth's China? – Rachel asked, not sure about this plan.

- It can work! – Kory said as she nodded at Oliver – If it worked for your Slade, maybe it can work for ours. And he would still be far away from here...

- Ok, we can try. – Dick said as they prepared to leave. – We bring him with us...

- And I can fly him there – Kara said as she nodded with her head.

- I'll go with you; I know that hell better than anyone – Oliver said reaching for Kara's shoulder.

Oliver would never let Kara go alone there. Only he knew the right location of the prison and even if Kara was invincible, that place was truly hell. He had been there alone; he knew what it felt like.

They all put the plan in motion and it worked. Slade did come after them.

It was an old warehouse and he smiled to himself thinking he actually caught them by surprise.

- I saw your faces on TV and thought to myself: time to make that bunch of kids pay. – Slade said as he took his mask off, his sword on his right hand. – I'm glad to find you all here and... Those two – He pointed at Kara and Oliver. – What? – He looked at Kara's symbol on her suit. – Related to him, aren't you? Or just a stupid fan?

- I'm actually not from around! – Kara smiled and flew towards him, blocking the attack of his sword. It made a cut on her hand and she looked surprised.

- Kryptonite sword! Yes, I learned my lesson after dealing with super family!

All Titans and Oliver attacked as they planned. At least they tried to. The idea was to Kara get rid of his weapons and weaken him so they would attack all at the same time and once he was truly beaten, Oliver would knock him down long enough to bring him to Earth 1, but they weren't expecting he would have a Kryptonite weapon. It was time for plan B.

Donna grabbed her lasso and used it to hold Slade's hands together while Kory melted his weapons using her powers. Her eyes became green and Kara thought it was a beautiful thing to see. It was like she was on fire but in control of it, like it all made her body and hair lighten up. She looked fierce and powerful. Dick, Jason, Dawn and Hank attacked at once, punching and kicking him anywhere they could, but Slade managed to get rid of them by kicking them far away. He got rid of Donna's lasso and Rachel stood before him. Her eyes turned black and she reached in front of her, a black smoke coming from her hands and attacking Slade right in the face, with Kara using her freeze breath at the same time, throwing Slade through the room and making him hit his back on the wall, falling down. Garr was in his tiger form and jumped him, biting anywhere he could reach.

Dick jumped him with his Bo staff in his throat, pressing it until Slade couldn't breathe and reached for his weapon. Donna used her lasso again and this time, she managed to lock his hands properly, making them burn. Slade yelled in pain. Oliver kneeled in front of him.

- Who the hell are you? – Slade gasped

- I've beaten a version of you on my Earth and wanted to do it again. I'm in a hurry!

Oliver punched him until he fainted. They all stood up, tired, but happy with the outcome.

- Now, let's go to Earth 1 – Oliver said as they grabbed Slade and Kara reached for her extrapolator, opening a breach.

- That's cool! – Garr said before stepping into it, following the others.

EARTH 1

Cisco walked around nervously. The Star Labs Hangar was never this packed before, half those people he had no idea who they were, but he knew they were all there for the same reason: saving the multiverse. Caitlin came closer, trying to calm her friend down.

- Hey, it's ok. They will be here soon.

- Who told you I'm worried? I'm not worried. I know they will make it; I'm not worried at all... Ok, why they are taking so long to come back? – Cisco said as he walked from one side to another.

- Cisco, they will be here, man. – Barry said as he looked at everyone else. – Hey guys!

Everyone stared at him, with a curious look.

- Only a few friends of ours need to come back so we can plan what to do...

- We actually need to know what is really going on... Details... - Thea said as she crossed her arms and sat down on the ground. – And especially why my brother had to go away for so long...

- We all want to know why. – Laurel said. – And I'm sure we'll understand it better.

Seg and Nyssa just looked around with curious eyes. They were from the past and from Krypton, so everything was still new for them. Adam smiled at them.

- I'm happy you got to know my world for a while... I used to live far away from here, but still...

- I'm happy to be here too. Specially to know that our family managed to grow – Nyssa said as she took a look at Kara from far away, smiling.

Seg looked at Kara as well, feeling emotional. He had no idea their kid would survive and give him grandchildren in the future, heroes that would protect an entire planet. He couldn't be more proud of them.

- I think that weird guy called the wrong Oliver. – Ollie said as he looked at Clark, feeling really impatient – I would have done this so much faster... I mean, the universe is ending, honestly!

- I know you are worried about Chloe... And miss her... - Clark said.

- What? Why?

- I can see in your eyes. – Clark said - They will be back soon and we will go back home to our friends and loves ones. Let's have hope.

A breach opened and Oliver, Kara and the Titans team came through it.

- Finally! Is everyone here? – Alex said, looking around and confused. She had no idea if anyone else was coming, and she couldn't wait to get all of that over with.

- Yes. – The Monitor appeared out of nowhere, making Cisco jump from his seat.

- Maybe a warning next time? Thank you! – Cisco said looking annoyed.

- Now that I have everyone I need here, let's talk!