MArvel: Ultimate Alliance.
Electross Omega says:
"Hey y'all I've played Marvel Nemesis, Justice League Heroes, and such but do any of you know about other fun exiting superhero games"
Cool, I always liked Johnny Ohm. The X-Men Legends games were cool. There's some older games for like Genesis and Super Nintendo that were really fun. There's a bunch of old Spider-Man, X-Men, and even an Avengers game. The Marvel Vs. Capcom games were always fun.