The future of Hulk lies in TV, not the movies. Guillermo Del Toro is developing a TV series for ABC, and I'm sure that, regardless of the success or failure of Avengers, Marvel is going to concentrate on putting Hulk on TV instead of future movies. I'd be surprised if he returned for Avengers 2, and I just don't believe there's a snowball's chance in Hell that TIH2 is ever going to become a thing.
That's disappointing, as the budget needed to make the Hulk look as good as it did in TIH exceeds that of a regular television program. Now, if HBO or Show Time were handling it, I would say it would have a better chance. In addition to the transformations, they are going to have to minimize the stunts, and when you cut back the action, it's going to be detrimental for the entry. Other Avengers would work in the network format, but the Hulk will not. It's going to look like **** or be a disappointment to the fans who want the transformation and resultant destruction.
And, I do not know if Del Toro is the best person to handle the Hulk. He is a visionary, but I do not know if his sensibilities will work well for the Hulk (it's the same problem posed if they brought Tim Burton on the project.) Del Toro should be directing the 'Thor' sequel.
But, there's a chance my concern might be misplaced.
Returning to the prior thread, I doubt that Marvel is going to jettison the Hulk from their cinematic lineup, considering the contracts they made for Letterier and Roth (of course, they might opt to pursue the route Warner Brothers did when they wanted Tommy Lee Jones as Two-Face.)
Anyway, they are probably going to have to recast Elizabeth Ross, as there is a significant chance the chemistry between Norton and her might not be replicated with Ruffalo (and this is not a slight against him; while I enjoyed Norton's performance, I do not want the film to have an internal problems, so I hope they would have verify that Norton and Tyler will work together well before committing anything to film. I want the film to succeed.)
Again, I am not an executive, so I could be wrong about everything. Or, entirely correct.