I'm not sure many care at this point. The first movie was a technological masterpiece, but not memorable otherwise. It didn't develop the fanaticism of a Star Wars, Indiana Jones, or even Terminator. Hell, anecdotally speaking, there is more excitement for a new Back to the Future movie -- which isn't even happening -- than more Avatar. Since Titanic's success, Cameron's has taken George Lucas's "well I can't make the movie because the technology doesn't exist" mantra and uber-charged it, spending at least 11 years wasting the latter half of his career away on an overly ambitious project for an IP that is no longer in the hearts and minds of many. I admire his devotion to what is clearly important to him, but I suspect he has vastly over-estimated how much people care about 1 more Avatar film (let alone how ever many sequels he has planned). Perhaps "pretentious" is the wrong adjective. And "self-absorbed" has too much of a negative connotation. I'm at a loss for an apt descriptor, but personally I tire of Cameron's shtick. I don't think he's the movie-making genius he thinks he is.