The film I'm most looking forward to at the moment is Hanna (
trailer), though the jury's still out on if it'll be any good or not. The reasons I'm looking forward to it are: it has the little girl from Atonement it (who stole that whole film imo); it's from Joe Wright, the director of Atonement and The Soloist; and the soundtrack was composed by The Chemical Brothers (I saw them live last week and they were brilliant).
Another film I've got my eye on is Cowboys vs. Aliens (
trailer). It could be terrible or it could be awesome, we'll just have to wait and see.