A lot of the major studios (Sony, Disney, Marvel, etc.) said they weren't going to show at Comic Con a few months ago. Now there's word that Marvel was just joking and will be setting up a S.H.I.E.L.D. recruitment booth at the Con, and that the first teaser trailer for The Avengers will be debuted there as well. Not only that, but they are going to have an Avengers panel as well.
Well, duh. Studios are going to bail on the best free audience marketing survey device they've had in years? Of course not. They would be stupid to do so. Now whether or not they actually listen to what's being said about their panels (yeah, Warner Bros., I'm talking to you) remains to be another story entirely.