Didn't Forza 2 come out last year? If I was a Forza fan, I would be pretty pissed off if Forza 3 came out this year.
I am also pretty sure MS would save Forza 3 for 2009, and try and release it about two weeks before Gran Turismo 5 comes out.
Alan Wake was supposed to come out this year, but then got delayed to 2009. I don't think they would get it out for 2008.
RE5 timed exclusivity is a possibility. It has been in development for ages, so it should be ready for the end of 2008. If the rumour of timed exclusivity is true, then this is a possibility.
I think the two games will have something to do with the x-mote. Probably new IP's that no one knows anything about yet.








