Guess Which Iron Man Character Co-Stars In Captain America. Plus Tron Poster And Transformers 3 Set Pics!Charlie Jane Anders5/05/10 9:00am111EditPromoteGo to permalinkCaptain America's villain, and a significant guest star, are confirmed. There are exciting posters for Tron Legacy and Splice. Behold Megan Fox on the Transformers set! Plus Lost, Doctor Who, I Am Number Four, V, True Blood, Stargate and Smallville.