I'm gonna assume some characters go without mention as they'd be given more priority in such things, so I won't list them (example: Wolverine).
Marvel Veterans:
Gambit
Cyclops
Psylocke
Capcom Veterans:
Captain Commando
Jin Saotome
Charlie Nash
Marvel Newcomers:
Nightcrawler
Quicksilver
Moon Knight
Capcom Newcomers:
Edward Falcon
Bass.EXE
Donovan (Darkstalkers)
Edit: Assuming edits before the deadline are fine and detailed regarding changes, I have to adjust. Removing Asura for Donovan (Darkstalkers). This should be the only set of changes (or edit) I do. If not allowed, then my apologies just let me know.