The time's early to think about that, I know. But this idea popped today and got me hyped !
It's maybe too much insanity and would not be fun, but then ! Four-player madness, teams, WOMBO COMBO !
Yeah just dropping an idea that has probably has already been considered. Doesn't need to be done right now though, focus on making the base game awesome is awesome.
Oh, maybe some kind of ball minigame ? Players hit a physics ball (or the opponent) and try to score goals or smth
EDIT : answered in FAQ. As expected, it is not to be expected