I loved Avatar, but I can only remember Jake and Neytiri. I can't remember the villain, or any of the supporting heroes....
1. When announced, the expectation was the sequels would have already been out or still in the process of rolling out. Yes, it was successful. No one is debating that. They're just debating where Avatar's relevance stands today.
2. None of those lands are part of a billion dollar overhaul that's been hyped up for 6 years and is supposed to "save" AK.