Avatar 4 is really happening, and is apparently well underway
"We’ve completed most of the first act," producer Jon Landau revealed on Thursday

Yes, you read that right: Avatar 4. As in, one whole sequel past the upcoming Avatar: The Way Of Water, a check-in with James Cameron’s family our favorite gangly blue friends Jake and Neytiri that famously languished for 13 years. So we’ll see you all in 2048 for the release party, right? We’ll bring the bladder polyps!
Well, it might not actually take that long this time, at least according to producer Jon Landau. At a press conference at the Busan International Film Festival on Thursday, he revealed that “most of the first act of Avatar 4" had already been completed, per Variety. There were, apparently, “logistical reasons we needed to do that.” (Could it have something to do with the fact that climate change could sink Avatar’s beloved merch-machine in Orlando before 2048? We’re just speculating here.)