Avatar is designed for general audiences, not genre fans. There's a fair bit of vitriol over it, but that vitriol seems to be generally confined to geek audiences. This group is well represented on the internet, but it only represents a very small portion of Avatar's overall viewership.
For general viewers, the story and characters were only a small part of the draw. Avatar's main draw was Pandora itself, and I expect a similar appeal for Avatar 2. The only way the film will fall short of being a huge hit is if Cameron's visual imagination somehow fails, but I don't see that happening. That doesn't mean that Avatar 2 will necessarily make as much money as it's predecessor, but it will still extremely successful.
For general viewers, the story and characters were only a small part of the draw. Avatar's main draw was Pandora itself, and I expect a similar appeal for Avatar 2. The only way the film will fall short of being a huge hit is if Cameron's visual imagination somehow fails, but I don't see that happening. That doesn't mean that Avatar 2 will necessarily make as much money as it's predecessor, but it will still extremely successful.