Huh? Avatar had a HUGE following by a bunch of hard core fans. That is the reason it made so much money.There was story after story about online fans who wanted to live in Pandora. People were actually depressed that the place didn't really exist. I think folks are forgetting (or maybe just unaware) because the movie was released so long ago and so much has happened cinematically since then.
This, pretty much. And if they don't fumble the sequels I wouldn't be surprised to find that Avatar does in fact become a major franchise with long-term legs in its own right, which is something that typically takes more than one movie to happen. There is after all a niche for issues-driven adventure SF that nobody's filling right now. (No telling whether this will happen or not -- The Wachowski Bros. with The Matrix had basically the same opportunity and wasted it -- but Cameron seems to be pretty consistent as quality goes.)