Not to crush theories and all but I think its official that Aang is dead, otherwise there would be no Korra.
Also, there can only be one Avatar, though that rule was never stated, it was inferred. Then again, no one has ever answered my question "what if the avatar were twins, is it allowed, has it happened?". From seeing the creators' response to questions I'm sure they will just toy me along until poof, no answer.
I do like the Azula-relative being Amon, thats aninteresting road to go down. I beliave its random though with the bender producing benders or non-benders. You get what got and live with it.
I think there are plenty of people that could take (could've taken)on the avatar. Especially this one not knowing air yet. The better question would be who is skilled enough to handle the avatar when they are in the avatar-state? Azula...she did kinda zapp through Aang that one time
Edited on 04/02/2012 2:35pm