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Who knows, it might have support characters, all we know for now is that it is a 3D fighting game with 4 combatants fighting at the same time and that it uses the DBZ Zenkai Battle Royale game engine, which is pretty good.
Watch Higurashi no Naku Koro Ni, if u haven't seen it yet. But beware, it has horror elements and psycho's in it and u may get very emotional sometimes.