i sort of am looking forward to this. i remember playing an mj game on sega when i was still in grade school at a friend's house ... i think it was called moonwalker or something. it wasnt too bad and I think we played it through over a weekend.
The Ready 2 Rumble series was entertaining, but I'll always remember him in Space Channel 5 as Space Michael!
Who knows what the next game will be like. To add to what Boss posted on the OP, IGN reported that according to Dave Perry, the game was supposed to ship with all new material. Possibly being a way to distribute a new album and bring in millions of new gamers. I imagine a platformer with dancing ala Bust a Groove/Move. That would be awesome!