I expect that they'll announce a release date for Lich King.
I highly doubt that, it'd be nice, don't get me wrong, but it's not even in beta yet. If they've not even got all the content in place, let alone started heavy duty testing of it, I can't see them giving out a date at this point. Especially based on their previous track record, they always leave dates until it's at least feature complete, which is usually about halfway through the beta.
Diablo 3, well, would be nice but can't see it myself.
My bet's on a starcraft 2 announcement.