These were the trailers (don't quite remember the order) that were played before Iron Man, and my reaction to them:
The Dark Knight: Decent trailer but still it's very hard to gauge the most critical aspect of the film: Heath Ledger's performance. The creepy make-up is great but the clips shown don't necessarily suggest a great performance, nor do they suggest a bad one. Bottom line: outlook murky.
Hulk: Still looks too CGI to me. Trailer reveals typical fight between Hulk and Hulk-like baddie. Did not "up" my interest in any way.
The Love Guru: Trailer doesn't have a single funny moment in it. Mike Myers seems to be fighting himself from slipping into "Austin Powers." Just awful.
The Spirit: Teaser for January 2009 Frank Miller film didn't offer anything that couldn't have been a Sin City out take; but I was a fan of Sin City so it's peaked my interest.
Indiana Jones: Great trailer thankfully doesn't reveal too much but instead does what a trailer ought to do: get you excited. Can't wait for Memorial Day Weekend!