I haven't gotten to play much yet, but the one match I did was pretty fun. I can't decide whether I want a Jeff/Dan quick look because of the One Piece one they did, or a GBeast one because of the Naruto one they did.
@ruukie: Most of the fighters are locked at the beginning. There's only about a screens worth unlocked, and for some reason it starts you on the last screen. Left and Right triggers to change screens.