So...it's finally out, and...I gotta tell ya, I'm not terribly impressed.
They dumbed it down with 3 attacks, light medium and hard, a SEPARATE BUTTON FOR LAUNCHERS (seriously wtf), and the only "new" addition is whatever that berserk mode activate is called. I say "new" because it's been done before, also, from what I've seen of it so far, it is ABSURDLY OVERPOWERED. As a side note, the last boss can either be super easy, or really annoying depending on the characters he throws at you (two at once).
As far as characters go...there's really not that many, and many of them I would consider throwaway anyway. You can very quickly and easily unlock all the ones currently available (cause you'll have to BUY the rest) but there's an asston of titles and artwork and such to unlock.
Overall...I honestly had more fun with Tatsunoko VS Capcom >.>