the details was confirmed like 2 weeks ago. Duet, more dance moves, more costumes, a Miku Miku Dance like song creator with stuffs you see in there. the addition of hold and arrows buttons is the best imo ^^; you could already get all the songs from japanese sites.

would be good if they allow video in the background instead :P need moar 2D PVs

oh, and there's an addon pack that makes you can play it on PS3 like Resistant Retribution too. ^^

@aspheric, BRS is never gonna be in there because she's not Miku :P if she will, then it will be paid DLC, because Sega will have to buy the right to use her :P

meh, may be some custom mod will show up.