They should make a Marvel themed Soul Calibur game. Centering around melee combat with weapons. I tried to keep it to the lower powered heroes/villians, because someone like Terrax or Firelord, who use weapons, wouldn't wait around for Cap to hand them their asses, they'd just use power cosmic.
Captain America -- his shield
Wolverine -- claws
Deadpool -- twin swords
Daredevil -- billy club
Black Panther -- claws and energy dagger
Killmonger -- spikey belt thing.
Punisher -- not sure exactly what to give him, since he mostly uses guns, but it would be funny to see him put the smack down on other players with a baseball bat and trench knife
Silver Samurai -- katana
Whiplash -- whip, duh
Psylocke -- her psychic knives and swords and crap
Nemesis -- her soul sword
Batroc -- whip-cane
Century -- axe/staff Parallax
Elektra -- sais
Taskmaster -- as one of those random characters, you choose him and he just uses a random fighting style from one of the other characters.
There are tons more who could compete...