I'll never understand why James Cameron is throwing everything in to the Avatar hat, but I hope it works out. While the movies are being worked on, Ubisoft is making another game in James Cameron's world called Avatar: Frontiers of Pandora.
This game using their new Snowdrop engine looks like it does an incredible job at creating a lush colorful forest environment for the world of Pandora. Of course, you're going to get the military vehicles that went to war with the people such as the mechs and helos coming after you, but you as a Na'vi will have a lot of the creatures native to the planet available for you to fend them off.
Avatar: Frontiers of Pandora is slated for the PC, Luna, Stadia, Xbox One, Xbox Series X|S, PlayStation 4, and PlayStation 5 sometime in 2022.