[Bruce_Begins]

Batman Wins, because he can (according to some comics) summon Bat-Mite who is an extra N th dimensional imp who always helps Batman, he is immortal and can alter reality according to his wishes (At level of Q in Star Trek)

He can just make all Marvel heroes power equivalent to ordinary human and then with level playing field, in a fair fight Batman uses his martial arts skills, ninja training, his utility belt to win.

case closed.