It would make sense to introduce the movie to a wider audience, since a major reason Avatar got the most money in the first place was the 3D appeal and the thrill of seeing it on the big screen.
However, James Cameron said he thinks it’s a “certainty” that Avatar will ultimately reclaim the top box office title from Avengers: Endgame through a re-release.
I can imagine Disney — which now owns everything — re-releasing Avatar in theaters shortly before Avatar 2’s December 2021 release date.
Watching it on Disney+ on your tablet isn’t quite the same.