Hah! What a strange dream you had! Imagine casting someone of a different race--Hollywood wouldn't do that! You would never see a black actor playing Harry Potter or a Japanese person playing Batman simply because those were "the best actors for the job," so OBVIOUSLY such a weird recasting wouldn't occur IF Hollywood ever decided to do an Avatar: TLA movie, right? LOGIC.

Hell, I (and many others) even have trouble keeping the "I LEARNED SOMETHING TODAY" out of grownup fiction. I have tremendous respect for people who can let stories speak for themselves. And when they do it for kids, they get extra super bonus points.