Definitely going to pick it up, I've been looking forward to it. From what I've read and seen it seems different and somewhat innovative. It'll let you freestyle and I'm hoping that will breath some new life into the music game genre.
I've got to go with X-Men Origins: Wolverine, the demo was great and it has gotten good reviews. GI Joe can't better any better than the movie, and that looks like crap. Transformers doesn't have a good track record when it comes to games and Terminator doesn't look too good either.