People are starved for anything new, particularly in this park. When they think about it for a day or two, they will remember (as they did when the land was first announced) that it:
1. Is focused on an intellectual property with no memorable characters that has already left the cultural consciousness (unlike Star Wars or Harry Potter), and
2. Its concept has nothing to do with a park centered on Earth animals - utilizing the same logic (its about another planet and they have some animals there and it kind of looks like a jungle) they could put an Ewoks or Chewbacca attraction in Animal Kingdom and it would make sense also. It does not.
It was a panic move at a time when Disney thought it had no intellectual property that appealed to boys. Panic moves rarely work out and, further, now they have plenty of intellectual property that appeals to boys that they own outright and are more popular than Avatar (Star Wars, Marvel, Indiana Jones). Their insistence on going ahead with Avatarland in Animal Kingdom is foolish. They should have just scrapped the idea and ate the investment cost ... or built a substantially downsized attraction/mini-land in DHS where it kind of, sort of fits.