Tony, Steve, Clint and Thor were just getting done with a late night mission, Tony's suit looked horrible from the dirt, debris and scratches it had gained that night.

Even the super soldier was a bit tired, Thor of course still had a few extra swings left in him though, "When we get back I have to fix this humming again." Tony said, mainly to himself.

"Again?" Steve questioned as he swatted dirt off his arm.

"Did you not recently boast about solving that problem?" Thor chimed in.

"In my defense," Tony started as he started to take off a glove in order to tinker with it, "I thought I had already fixed it." he grumbled as he held the glove up near his head and shook it.

"You hear it right?" Tony asked Clint as he held the glove up beside Clint's ear.

"Ow!" Clint said before shoving the glove away from his face, causing it to fall to the ground with a small clang.

"Hey watch it!" Tony warned as he picked up his glove.

"It made my hearing aid start hissing and humming." Clint growled at him.

"Oh yea, the frequencies counter act with each other, sorry, I forgot about last time you were near when my glove started humming." Tony apologized.

"And it also blew up, some how taking an entire section of wall out of the lab." Steve added.

"I'd still like to know where the hell that wall went." Tony said as he reminisced the day of the disappearing wall.

Banter was thrown about for a while as they walked, Tony still inspecting his glove, eventually he got mad and smacked it with his other hand.

The humming got very high pitched, it soon started cracking with electricity and smoking until he threw it onto the ground, where it proceeded to catch on fire.

Thor stomped on it trying to extinguish the small fire that consumed it, but as soon as his foot met it, lightning trailed from his hammer straight through him, crashing into the malfunctioning glove with bright blue sparks.

The group flinched at the bright light that quickly consumed them, moments later an explosion echoed.

When they opened their eyes, they seen that they were no longer standing on the street they occupied before, but now in front of a warehouse.

"Where the hell are we?" Tony asked as he looked around at the surrounding area.

"It would appear you are in Starling City according to GPS coordinates." His AI replied.

"How the hell are we in Starling City?" He asked no one in particular, before he picked up his now crushed glove to examine it.

"Starling City, never heard of it." Steve chimed in, Clint was trying to get his hearing aids to work the whole time Steve, Thor and Tony were trying to figure out how they unwillingly and unknowingly traveled so far.

☆☆☆

While this was happening, Oliver, Thea, Barry, Caitlin as Killer Frost, Cisco and John had just arrived back at the bunker, "I'd like to thank you guys for helping with that." Oliver said as he retrieved six glasses and a bottle of alcohol.

"No problem, just a few rogue metahumans, no biggy, right?" Cisco laughed as he elbowed Barry.

John took off his helmet "None for me, I got to go soon." John spoke up as Oliver was about to hand him a glass.

"Right, John has a doctor's appointment in like-" Felicity looked at her watch before finishing her sentence, "Three hours, yikes." She said.

"Never mind, I need to go like right now, bye guys." John laughed as he walked toward the elevator.

"So, where's William?" Caitlin asked soon after Killer Frost left her to be herself again.

"At a friends house, Friday night you know." Felicity laughed.

"I keep forgetting you have a kid now too Oliver." Barry joked.

"Looks like you're next in line to have one." Thea said as she and Cisco burst out in laughter.

"Woah, wait, me and Iris haven't even been married that long!" Barry nervously waved his hands in front of himself gaining a laugh from everyone else in the room.

The jokes were short lived as an alarm sounded, spooking Caitlin back into Killer Frost, "What is it now?" Oliver asked, sounding a bit annoyed.

"An explosion at a warehouse not far from where you guys just took down the metas." Felicity replied.

"Four thirty AM, can't they wait to blow things up until I'm at City Hall?" Oliver joked as he grabbed his mask and bow again, "You guys want to come just in case it's another meta?" Everyone nodded and agreed.

☆☆☆

Quickly the group stepped out of the portal Cisco made only to be met by the whirling sound of Tony getting ready to shoot them.

As soon as Clint seen the portal open, he dropped the hearing aid he was trying to get to work and before anyone even took a step out of the portal he had his arrow trained on the portal, Steve and Thor stood battle ready.

Upon seeing the group in front of them, Cisco and Caitlin raised their hands ready to attack, Oliver and Thea drawing their own weapons, Barry sped to their side just then, "Woah, I take the scenic route and everyone's about to fight without me." He joked

"Who the hell are you guys?" Tony demanded the group of kevlar outfitted heroes who just showed up seemingly out of nowhere.

"We could ask you the same thing metal head." Caitlin spoke flatly.

Thea glanced at Steve, then back to Tony, "Arc reactor?" She questioned outloud.

"What?" Cisco asked from beside her.

"Look at his chest, doesn't it remind you of-" she started to talk but was quickly cut off.

"Iron man?" Cisco questioned loudly as he stepped back a bit, his hands still ready to fire.

"Tony Stark, now who the hell are you guys?" He asked again, this time sounding a bit more angry.

"First, I can't believe you like comic books Speedy," Cisco said as he put his hand down and pointed at Thea, "Second, we're superheroes too." He then stepped toward the group and held out his hand for Tony to shake it.

Tony reluctantly lowered his hand and extended the hand that was not armed, upon seeing the two shake hands, everyone slowly eased up, and lowered their weapons.

"So, uhm-" Cisco started to talk but was interrupted by Caitlin.

"You don't exist in our world, so how the hell did you get here?" She stepped forward with her hands still icing over at her sides.

"Well that's the same thing we were wondering Ma'am." Steve stepped forward slightly, still not comfortable with their new found company.

"Don't call me Ma'am, I'm certainly not older than you." She laughed as Cisco elbowed her gently.

"You recognise him now too?" Cisco quietly asked her, she just nodded slightly in reply.

"The shield kind of gave it away." She whispered to Cisco.

"Want to, I don't know, fill us in?" Barry spoke up just as Oliver opened his mouth to ask what everyone was talking about.

"Meet four of the Avengers." Cisco laughed.

"Like the comic book characters?" Barry and Oliver spoke at the same time, completely dumbstruck.

"Exactly." Thea replied, Tony stepped forward to grab the glove he threw to the ground when the portal opened, Clint did a similar thing to grab his hearing aid.

Upon seeing Clint pick up his hearing aid Caitlin quickly stepped in front of him to sign something to him, at the same time she spoke so everyone else knew what she was saying.

"Your hearing aids won't work properly here, our Earth is a complete different frequency." She then stuck her hand out as if to ask for her to see them, he handed them over then she handed them to Cisco, "He can fix them." She smiled.

"Well we can't quite get you home tonight, I'm almost all vibed out." Cisco explained to the otherworldly heroes.

"Plus I'd like to know how they got here." Thea added.

"Arrow, could we take them back to the bunker and maybe figure this out?" Barry asked.

Oliver just nodded at first, "Overwatch, it's your call." Oliver said into his comm, waiting for Felicity to give them the okay, which she did almost immediately.

"Ok, Thor, you and Tony can fly, right?" Thea asked, Thor assured her that he could, but with only one gauntlet Tony clearly couldn't.

Much to his hatred, Thor offered to fly him to the bunker, "We never tell Bruce about this, he'll never let me live it down." Tony demanded.

"Flash, you want to give the rest of us a ride?" Oliver asked the speedster.

"As long as you buy breakfast." He joked in reply, the whole time Caitlin was signing for Clint so he would know what they were talking about.

"You, just follow the electic streak of light as it goes with the rest of us, okay?" Thea questioned Thor, gaining a quick grin from the god and a simple yes.

"You up for a little cardio Flash?" Cisco asked sarcastically.

Within minutes everyone was at the bunker, "So, you all know our names, what are your names?" Tony asked, introductions were made, both by superhero aliases and by name, once masks were removed and Killer Frost turned back into Caitlin.

The heroes all spoke among themselves, Thea and Cisco were fangirling over actually meeting Thor and Captain America, Tony was trying to flirt with Thea, only to be ignored by her, and openly rejected, so instead, Oliver and Barry chatted with him.

Felicity and Caitlin started signing to Clint, making small talk between helping Cisco re-adjust the frequency of the hearing aids, "So frosty, how do your powers work?" Tony finally gave her a nickname and asked.

Finally they fixed the hearing aids, "When I'm scared or in danger, Killer Frost comes out." She answered.

"Sounds kind of like Dr. Banner's situation." Thor surmised.

"So how did we get here?" Clint finally asked the question that was bugging everyone on one level or another.

"Well, thats what we would like to know." Cisco laughed as he took off his gloves.

"Barry, go grab us something to eat while we try to figure this out." Oliver encouraged.

"Using my speed for your own gain, I see how it is." Barry laughed before speeding off.

The elevator doors opened a second later, "Oliver, Thea, Felicity, I'm back!" Roys voice carried through the bunker.

"Roy, back here!" Thea stood up and walked toward the elevator to greet him.

"Wait, who's Roy?" Tony asked as he looked back to see Roy decked out in his red arrow uniform, bow in hand, "Another archer boy?" Tony questioned as he looked back to Clint and Oliver.

"Meet Arsenal," Thea started, "Woah, You're Hawkeye!" Roy exclaimed, "Roy Harper." Thea finished quietly.

"That's me, Clint Barton." He said as he stood up to shake hands with his fellow archer.

"Dinah, Rene and Curtis are already heading back to their bunker, said to tell you sorry they couldn't help with the metahumans last night." Roy explained when he turned his attention to Oliver.

Barry showed up seconds later with an arm full of fast food bags, "So what were you guys doing before you breached over?" Caitlin asked as she helped Barry set down the bags food on the table.

Steve explained how Tony's gauntlet started humming, then the rest of what happened up until Tony asked Jarvis where they were, "Wait, you have an AI too?" Cisco questioned almost immediately.

"Yes, wait, what do you mean 'too'?" Tony was clearly confused by this.

"Yeah, we had an evil speedster from the future who was playing a good guy, he had a place where he kept his suit, we call it the time vault, he had an AI in the time vault, apparently I made her in the future, her name is Gideon." Barry explained.

"The Legend's have a Gideon on the Waverider by the way." Thea added.

"Wait, the Legends?" Steve quickly asked Thea.

"Yeah, they're our friends." Felicity laughed as she walked up behind Oliver and wrapped her arms around his neck affectionately.

"I believe we have met these Legends before." Thor chuckled.

"The time travelers." Steve concluded.

"Wait, you met them?" Thea asked as she sat down across Roy's lap.

"Yeah, not too long ago actually, long story about that though." Tony laughed.

"You're the superheroes Wally was talking about?" Barry asked before anyone else could start talking.

"That's us, your friend Leonard fell out of the sky with some crazy time traveling magic chick who took our whole team out without breaking a sweat." Clint explained.

"And Loki." Tony added.

"Yea, Loki too."  Clint corrected himself.

"So, how do you all and the Legends know each other exactly?" Steve questioned as he motioned around the room at all of the unmasked heroes.

"That's a long story too." Felicity joked.

They took turns explaining the bits and pieces, from Oliver and Sara's night on the Gambit and Sara dying then being resurrected after actually dying later, to Barry and Felicity's odd relationship, to Thea and Roy's first meeting then Oliver and Felicity having an impromptu double wedding with Barry and Iris.

When they were done explaining it was almost time for Oliver to be at City hall, "Well the mayor needs to get to a council meeting." Oliver said before getting up to leave.

"Don't forget to pick William up after you leave City Hall." Felicity reminded him before he went to get changed into his tuxedo.

Authors note:

Takes place in the same timeline like thing as The Battle Guardian: Marvelously Legendary crossover but at a later date in time.
This story will lead up to a creation which will be of use in a few of my upcoming fanfictions, including the unnamed Battle Guardian sequel I have began planning.
In my perfect world, Roy and Thea are on team arrow at the same time, so here that is.
Part two is in the works, just be patient.