co-op, online play sounds good, but would probably require using a computer or phone in conjunction, don't see how communication would be done otherwise (without loading additional new features into the machine).
but, online co-op play could offer things like x, y and z modes must be completed to play wizard mod, so each player can aim at a mode to complete, then everyone plays the wizard mode together which could be like a Deadpool villain mode, but more shots.