Tron is great, colors work well. Black Swan... gotta love Natalie. Buried, I actually prefer the initial advance over the Vertigo style. Toy Story 3 is going to be a classic. Salt... come on, Mr and Mrs Smith Advance is the ultimate Jolie poster to own.
Burlesque is really an eye catcher, but I guess you would probably need to like one of the stars.
Frozen and Hatchet 2 are going to be scarce horror posters down the road.
Human Centipede, good luck finding, and let me go on record as to saying I have no idea how this movie got green lit to be made.
Piranha 3D final, FANTASTIC horror poster, is going to pick steam on DVD release.
Skyline, I have not researched at all, but the detail on the advance poster is amazing.