In the original script of Avatar 2 there was a spectacular battle sequence set in space which was later canceled, here is the reason revealed.

With a duration of more than 3 hours, Avatar: The Way of Water gave viewers adrenaline-pumping and breathtaking scenes, but one in particular was going to be deleted from the script. Originally, in fact, one was included in the screenplay great battle in space.
“There was this idea of showing a space battle with the Na’vi. We were going to bring it forward and we talked about it for a long time. Then we realized that maybe it couldn’t work with the story we were trying to tell. Jim he took a few weeks off and wrote a brilliant script. It ended up being never done because it didn’t fit our side of the story.” said Rick Jaffa, one of the screenwriters of the film, to the microphones of Entertainment Weekly.
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Some of that cut material now lives on in comic book form. Avatar: The High Groundwritten by Sherri L. Smith, was published in three volumes and includes the story of that scrapped script, which takes place within the time jump that occurs at the beginning of the The Water Way.
Given the resounding success of Avatar: The Water Street, which beat Top Gun: Maverick at the box office to become the most profitable film of 2022, the already announced sequels will be made. Furthermore, according to the experts, the second chapter of the story directed by James Cameron could enter the Top 5 of the films with the best receipts of all time. If this happened, the director would have three of the six best-performing features at the box office thanks to Avatar and Titanic.