The more thati think about it the more i realize that aang has to be the last avatar due to the fact that no one will be around to teach the next avatar (water bender i think). if there is no air bending then wont the world always be in disorder? The only thing i can think is that if appa is still alive then maybe appa can teach the next avatar. is there something that i am missing? Is there any way that if Aang has kids would they be air benders and slowly rebuild the air nomads? Just wondering...