I remember on another forum someone had a TL where they imagined a world where Avatar: The Last Airbender was an original Nickelodeon series airing from 2005 to 2008 and The Last Airbender was an insanely bad adaptation of it in the early 2010's. I mean, could you imagine if one of the best cartoon of the millennium (and a tie-in, no less!) was the first one to come out in the franchise, and M. Night Shyamalan adapted it into a movie, especially in his career stretch around the early 2010's? Just imagine what Nickelodeon and Paramoint would be like here.
In this Timeline, TLA was made first, being made after The Village based off an idea Shyamalan had and made with J. Michael Straczynski, and was needless to say much better then what we got. The cartoon was a loose remake of it but generally the same as IOTL bar a few story beats and voice actor changes, most notably many of the movie actors ITTL (for you to make, and yes, were not given racebending) reprising their main roles. Shyamalan served as an executive producer.