XBOX.com has just put up a page for the game, it does have a few new images that look alot better than the ones already posted here.
Also, the XBOX Live Vision cam will be put to use, most likely in the same way as it was used in the past game. Which is a good thing as I havent used my Vision Cam at all.
Another good thing is that on the xbox.com page it states the following:
Expand your library of music with hundreds of downloadable songs
Also xbox.com confirms a new song "Bohemian Rhapsody" made famous by Queen.