Re: Who should be the villain in an Avengers sequel? (Poll)
^ As of now, the films for which we have confirmed release dates are Iron Man 3 (May 3, 2013), Thor 2 (November 15, 2013), and Captain America 2 (April 2014). We do know that an Avengers sequel is most likely coming, but we don't have many details about it at this point.
Regarding a sequel to TIH, there are currently no plans for the character of Bruce Banner/The Hulk to be featured in another solo film, as was confirmed by Kevin Feige a week or so ago.