Avengers Upstate

It was a normal day at Avengers Upstate. Tony has called everyone there for this momentous occasion. Tony made a portal to another universe and Stephen decided to bring his son Y/N along to see.

Tony: "Finally, after years of work, we have a made the impossible... POSSIBLE!" The Billionaire said while looking at everyone. It would be an under statement to say he wasn't excited. And as he nerds out, Pepper looks at Tony and puts her hand on his shoulder. She could help but smile at him.

Stephen: "Can we get this show on the road? I need to head back to the Sanctum." The Doctor said while crossing his arms. His cloak collar lightly hit his head to signify 'Hey, don't be rude.' And Y/N laughed quietly at the cloak.

Tony: "Oh, of course. And with the help of Banner, Thor, And the Wizard... we present the portal!" Tony pulled a sheet off and the metal portal was shown. What was more noticeable... The Infinity Stones were there.

Everyone was shocked that the infinity stones were there. After everything that happened, why would you use them.

Y/N: Mr. Stark, why are you using infinity stones? They are to dangerous.

Tony: It was the Only way to get it working. We needed high points of power and we have it.

Everyone slowly nods in understanding. They watched as Tony starts pressing some buttons and the portal starts to open up.

Y/N watched it a little un inpressed. He can make portals by himself. But it would be lying to say he didn't think this wasn't cool. Tony looks at Y/N and walked to him.

Tony: Hey Kid. Want to walk through the portal?

Y/N looks at his father and he got a nod. He walked towards the portal, took a deep breath... and walked through. People stopped and just stared. It was so quiet a pin could be heard being dropped. Stephen's hands slowly shook a little since he was nervous...

Meanwhile in the Portal.

Y/N was walking through a calydoscope plain and he was looking around.

Y/N: "Hmm... so what will this Universe look like? Who will I meet... hopefully I don't embarrass myself..." The teen walked through until he saw a white light ahead of him. He stopped and looks at it.

Y/N: "Well... should i head towards the light? Usually that signals it's bad... like death bad." Y/N talked out loud to himself until he heard a scream. This snapped him out his train of thought, and he ran into the light.

Unknown Place

A girl in a Red Cloak was running through a forest at the moment. She seems to be looking for someone.

???: Ugh! Where is everyone? I need to find a partner quickly.

The girl said while running. But at the corner of her eye, she saw a bright flash and stopped running. Her curiously got the best of her and she slowly walked towards the bushes.

???: Who or what was that?

She said quietly while walking through the Bushes to see what it was. She saw a male in a bunch of weird robes.

???: Uhh... Hello sir?

The girl asked and the male looks at her. She looks up at him and the cloak.

???: Seems like we're partners... what's your name?

Y/N: Oh, names Y/N Strange. What about you, and where am I?

The female looks at Y/N confused since he didn't know where he was. She could have sworn the Headmistress told everyone.

Ruby: Well my name is Ruby Rose. And your in the Emerald Forest. How do you not know?

Y/N: I'm from another Universe.

Ruby's eyes widen and she gasped. She was so innocent, and she believes him instantly.

Ruby: REALLY?! THAT'S AWESOME!

Y/N laughed quietly and looks at the open portal and thought for a moment. He then made the mirror dimension and so the portal was protected.

(Back in the Marvel Universe)

Stephen was sitting around as the Party was wrapping up and he got impatient. He gets up and starts walking to the portal then thought. He should bring some of the Next Gen Avengers to join. He knew 2 would join, but the last one will most likely not.

Stephen: Parker, Shuri, and... Laura. Come with me so we can get (Y/N) Back.

Peter, Shuri and Laura all had mixed Feelings. Parker was ecstatic and wants to go. Shuri wanted to see what was on the other side. And Laura didn't really care, but just wanted to go so she didn't have to bed.

Stephen and company stepped through the portal and flew through the Realm. Strange stayed behind everyone just in case something happened. But while he was keeping watch Peter, Shuri,and Laura were talking about this.

Peter: "I can't believe this is Happening! We are actually going on a mission that doesn't involve fighting." Peter said Happily as he twirls around.

Shuri: "Calm down, we might have to fight if he is in danger. This is a new Universe." Shuri reminds Peter while then looking at Laura. She really hoped that (Y/N) isn't hurt since you are all great friends. But deep down she knows he will be alright. "What do you thin about this?"

Laura: "I don't care. I only came so that i don't have to go to bed." Laura said while looking away. But deep down she did think this is exciting a little. Laura then can see a bright light and the outline of (Y/N). "Hey, I think I see him!"

Stephen: "It Is! Hold on!" He said as he grabbed everyones hands and flew faster. They flew through the portal and flew through (Y/N) and Strange stops. "Oh, so he made the mirror dimension to keep the portal safe." He said while letting everyone go. He stopped the mirror dimension and Peter starts glowing.

Peter: "W-whats happening?!" He shouts as he starts to panic. His body starts to glow all over and his body starts change.

(Y/N): "What are you doing here?!" He said quickly as he ran from Ruby to Peter's side. He helped Parker up and his eyes widen. "what... the hell?" He asked and slowly moved back. Parker slowly gets up and everyone even Stephen's eyes widen.

Parker: "W-whats wrong? Why are ya- wait... why is my voice higher?"

Shuri pulled out her phone and took a picture. "L-look...'' She said while showing the picture and Parker looks.

Parker: "O-oh my god! I'M A FEMALE!" She screamed .

(And the story Begins.
I have seen stories where people are either trapped or already lived in Remnant. So I'm doing a Inuyasha spin on it. He will be able to use the portal to Remnant, or even sling ring there if he wants to, spend time there, And then later return home. So he has 1 life in the Marvel and RWBY universe.

I decided to bring in the X-Men characters too since they are technically part of Marvel. Thats why you have Laura there. And Regarding Peter, in this universe everyone is a female even males. The only reason why The Strange's didn't change is because there magic. So I hope this clears some stuff up.

And I hope this does well.)