We'll, it's not really new, but it is the classic fighting mode we've seen and love in fighting genres, a la Street Fighter.
I'm not sure if it has been suggested already, but here it goes:
We have Hit point bars, and the only way to deplete our oponent's is to gain AP and land supers. The amount of HP damage should be balanced according to characters, of course. It's simple, really, and I think some of us would really love to see it in this game.
What do you guys think?