Originally Posted by AvengeME
He was never a long time Avenger so making him a staple of that franchise is a mistake. I don't think he should be featured there. He is a stand alone character. Instead, I would do a standalone movie with the Leader and maybe introduce some other key Marvel characters, like Namor or Reed Richards (if they have the rights). But don't make it an Avengers 2 prequel. End the movie with the Hulk getting exiled... setting up a World War Hulk movie or some massive event later on in the timeline.
I agree that they should use the Hulk sparingly as a team member. The Hulk is more of a force of nature, and he is at his best when it's "him versus everyone". That's why a gradual timeline of > The Hulk "too out of control for earth" with the cliff hanger of banishment to Planet Hulk in 2015 > Planet Hulk in 2017 > end the decade with WW Hulk. By the end of the decade, most of the major MCU heroes and villians will have been introduced in films for "Hulk to smash!