Marvel has the exclusive on a display that until recently had been a secret at their booth at Comic Con.  The cover was pulled off to reveal the helmets of the three main characters, Thor, Loki and Odin in the upcoming Thor film.  These are the actual head gear worn by Chris Hemsworth, Tom Hiddleston and Sir Anthony Hopkins respectively:

Not bad, not bad.  Pretty interesting even.  Although, if Marvel really wanted to make for an impression at Comic Con, they’d have stuffed Natalie Portman, Jaime Alexander and Rene Russo in that display case.  That’d be some real exclusive stuff right there.  Thor opens on May 6, 2011.

Thanks to Brian for the tip.