Comics are clearly the best way to go. I always want to know about the Avatars after their big showdowns with the bad guys. And since that usually ends on the cusp of adulthood, it makes more sense to be in comics and not TV. TV bigwigs won't let characters grow up. And none of those bigwigs are going to let Korra be a lesbian. 'But the children!' How 'bout but the children will understand it just fine.