I agree with FW, he makes sense. Also Hulk cannot be controlled mentality, has been before though and has snapped out of it on his own. You cannot control the mind of a beast, impossible.
Naturally Hulk can live forever. Why? I've read about the Nuclear Wars that killed everything on Earth. Only beings left were Mutated Giant Roaches and Bruce/Hulk. The Roaches tired eating him, but he would always regenerate. Eventually Bruce himself died and his body morphed into Hulk. Hulk sat and waited to transform back into Bruce, but it never happened. Basically Bruce died, but Hulk will live on.
Overall: his a beast and you cannot contain a beast. It is impossible.