For Marvel 4, if it happens, I would want a few things from it.
- Bring back Spider-Man, Deadpool, Iron-Man, Storm, Wolverine, Ryu, Doom, Chun-li, Strider, Magneto, Zero, Tron and Ammy from the last game.
- Bring back Mega Man(or use another Blue Bomber), Venom, Captain Commando(more so for others than myself) with some new tricks up their sleeves to make their comeback more interesting. Maybe MvC2 Jill.
- Make Web Swing QCB again.
- Add some single player stuff, no complex story mode, but Survival, Arcade, Time Attack and Solo Fighter(kind of a cool gimmick in MvC3) would be nice. Training mode too.
- New characters: Mega Man X/Mega Man EXE(if Classic isn't back), Black Panther, Green Goblin, Ms.Marvel, Gene from Godhand.
- Get a good handful of sick stages, shouldn't be too hard, since the last game had them, but be careful with the colors.(people complained about stages being too dark last time.)
- Decent Online
- Tons of color swaps, if it can be managed.