While I still support the (idea of, depending on the implementation) Avatar expansion, I'll just say that the only references to Avatar The Movie in probably 3 years, aside from the discussions on the WDW expansion on here, is in an article entitled "
14 movies you thought were good, but were actually quite bad".
Aside from that, I've not heard or seen a single person talk about it after the original theatrical run ended. Yes, once the sequels are added, it
may connect with people more as a small piece of a larger puzzle, but as of right now, it's basically dropped out of pop culture lexicon. Movies like Shaun of the Dead, Cabin in the Woods, Attack the Block, the entire Marvel Cinematic Universe cannon, are recent movies that remain in pop culture. Avatar is not.