Kinect Star Wars now features five modes: Jedi Destiny: Dark Side Rising, Podracing, Rancor Rampage, Galactic Dance Off and Duels of Fate. (No, Galactic Dance Off isn’t a typo — that mode features Star Wars-inspired pop tunes. And you battle Darth Vader on the dance floor. Yeaaaaaaah.)
Buy the bundle and you get an extra unlockable for that Galactic Dance Off — C-3PO. I bet he’s really good at doing The Robot. Just a guess, though.
You can preorder the bundle on Amazon here (and ignore that June release date).