The Titans from the 00s tv show battle it out with the movie marvel team.

Fight 1) 5 on 5 battle.

Robin, Raven, Starfire, Cyborg, Beast Boy vs Captain America, Wanda Maximoff, Iron Man, Vision, Spider-Man

Fight 2) All Titans vs All Avengers. For the purposes here I'm counting all the superheroes that tried fighting Thanos as Avengers, so the Guardians members are in too. The Titans get all the young hero allies from that final season, except for Kid Flash and Mas y Menos.