A factor you must have to still have Aang learn that, but he already knows how to airbend, and another factor is the air nomads must fall, but he air nomads are already dead. So what we first did was bring back the air nomads, and then create a new airbending. Continue reading...
This is a place were we finish Avatar the last air bender too go into Avatar Dawning of Darkness. Avatar final chapter is pure fan fiction, and should not be taken harshly.