Transformers: Revenge of the Fallen
Star Trek
G.I. Joe: Rise of Cobra
Angels & Demons
Monsters vs. Aliens
Land of the Lost
Fast & Furious
Up
Those are confirmed; X-Men Origins: Wolverine, Harry Potter and the Half-Blood Prince, Terminator Salvation, and Watchmen trailers are rumored.
That's a lot, isn't it? Like, more than usual.