Lou Ferrigno (famous for playing the Hulk in the old TV series) claimed that Hulk was the character who saved the day in The Avengers and went on to say; "Now because he saved the day, they're making another solo Hulk movie after the second Avengers comes out."
As much as Ferrigno is connected to the character of the Hulk, I don't believe a word of this. I really don't think MARVEL would tell Lou Ferrigno their plans for the future of Hulk. In The Avengers movie, he did some of the voice work for The Hulk, so his role wasn't that big. I honestly think he just wants the Hulk to be the most popular character in the MCU, so I wouldn't really go along with this.
I do believe we are going to get another Hulk movie eventually but Lou Ferrigno saying this doesn't really mean anything.