My Hero Academia, Young Justice, TMNT 2012 Avengers!

The My Hero Academia Class 1-A were training out in the woods one day with, All Might. The Symbol of Justice. While they were training, Deku (Izuku) Midoryia and Bakugo were fighting. A villain named, Dabi attacks them out of nowhere and somehow, the three of them created a portal while fighting.

All of class 1-A, All Might, Dabi, Aizawa, Present Mic, Midnight and MT Lady were teleported to the same universe the, Avengers were in. The MCU, DC Young Justice and the TMNT 2012 share one universe.
When they teleport into the new world, they see the Avengers fighting Hydra. Unaware of things there, they have to surivive if they want to return home. But when the Avengers bring them home, Bakugo, Shoto Todoroki, (Toya) Dabi, Hitoshi Shinso, and Tenya Iida ended up meeting..her.