Avenger x MHA 2

The day had started normally at UA High School. Class 1-A was gathered in a training room, while Aizawa observed his students with his ever-present tired expression.
Aizawa: "Today, team combat drill. And try not to destroy anything."
He had barely finished his sentence when a strange light appeared in the center of the room.
Midoriya: “Um… Sensei?”"
The energy suddenly began to swirl, forming a huge portal.
Bakugo: "WHAT IS THIS THING NOW?!"
Iida: "EVERYONE, EVACUATE THE AREA!"
BOOM. An invisible force sucked the entire class in. A few seconds later. Silence. The students slowly opened their eyes. They were no longer at UA. Around them stretched an immense, ultramodern complex. Bright screens covered the walls, unfamiliar machines were scattered everywhere, and beyond the gigantic glass windows, a city none of them recognized stretched as far as the eye could see.
Uraraka: "...Where are we?"
Kirishima: "It doesn't really look like UA..."
A voice suddenly rang out behind them.
???: "Very good observation, red hair."
They all turned around. A man stood at the top of a staircase, hands in his pockets. Impeccable suit, a wry smile, a confident gaze. Tony Stark.
Tony: "Welcome to Avengers Tower."
Silence. Midoriya's eyes widened.
Midoriya: “T-The Avengers…?!”"
Tony raised an eyebrow.
Tony: "Ah. You know it. It saves me from having to do PowerPoint presentations."
Bakugo immediately stepped forward.
Bakugo: "And who do you think you are to talk to us like that?!"
Tony smiled.
Tony: "Oh. I already like that one."
Aizawa: "Nobody touches anybody."
A second voice echoed behind Tony.
Steve: "Tony."
Captain America appeared in the hallway. Then Thor. Then Natasha. Then Bruce. Then Clint. And finally, Peter Parker poked his head behind Steve, completely intrigued by the group of teenagers.