Transformers: I don't know a lot about the Transformers and don't have any nostalgia for them, but man those trailers look cool.
Harry Potter and the Order of the Phoenix: Haven't read the books (yet), but I love the movies. I've already pulled out the first four DVDs to rewatch before this comes out.
Sunshine: The only non-blockbuster to catch my interest this month, and since it's a scifi adventure from the director of 28 Days Later, it's "non-blockbuster" status is pretty iffy. Even then, its being about a mission to the sun doesn't thrill me at all. The only reason I want to see it is because it stars the creepily fascinating Cillian Murphy (Batman Begins, Red Eye).
The Simpsons Movie: It's been years since I've watched an episode of The Simpsons, but I don't expect that much has changed, including that I'll think it's hilarious. In fact, I suspect that I'll probably find it funnier than I would if I was still exposed to it on a weekly basis.