[atlgator]

Has the story changed from the last 3 times they've told it?

[jfengel]

Yes, in that it's a sequel, about an older Aang.

It fits between the original animated series and Korra, so it might cover some story referenced in Korra. But it should be new material, unlike the two live-action remakes (the truly abysmal one and the more recent, kinda-ok one).