There hasn't really been any formal announcement made, but Walt Disney Studios has announced that Marvel Studios will very much be in the house at the Con. Producer Kevin Feige and "special guests" will be there presenting "an inside look at the ever-expanding Marvel Cinematic Universe".
Intriguing to say the least, since some little tidbits would almost have to start leaking out sometime soon.
If you'd like to try and see the hour long panel for yourself, it'll be held in Hall H at Comic Con on Saturday July 14th at 6:00pm.
*Screenshot from Sega's Iron Man for Xbox 360