James Cameron is a legendary creator because there is no other way to describe his success with the Avatar franchise. He now says he is ready to pull the plug on the franchise if the film flops. I'm certain the film will make lots of money as it is riding on nostalgia too. However, great producers generally stand by their work whether they are doing well or not. I think, if he has the story for at least one final Avatar film, he should totally go for it.