Kevin Feige, Marvel Studios president, was doing an interview recently and had this to say about an Incredible Hulk movie
“We have been discussing after Avengers what that would be, what that would look like. It’s really Mark Ruffalo portrayal of Bruce Banner, in the way Joss Whedon brought him to life in Avengers that worked. It’s even why you ask me that question. Which is good, we wanted that to happen, we wanted people to come out of Avengers saying The Hulk was their favorite character or at least on of their favorite. The fact that it did happen, was awesome. So, you know, all of the effort related to Hulk right know is going to Age of Ultron. It’s exciting, because he hasn’t been in any other film, so you can expect to have a lot of Bruce Banner and Hulk in Age of Ultron. Where we go after that ? We’ll see. It will be a little while before we figure that out but, we do think there’s plenty of opportunities with the Ruffalo Banner.”
It sounds like Marvel is definitely open to another Hulk solo movie but it may not happen as soon as I would like it to. Maybe the Hulk will be the best character in Avengers 2 like he was in the first movie and they will not have a choice but to make a movie.