Absolutely. Good question. The way we had it originally was that by the time Aang was through being amazed by the new world, he had already been corrupted a bit too far by Azula and found it very difficult to contact the spirit world. He eventually had to go on some sort of quest to revive his connection - perhaps meeting with Guru Pathik, or the Lion Turtle sought him out, or something like that - and those Avatars would have a hell of a lot to say about the situation. We never really nailed that plot point down, but that was the basic concept. Azula was too seductive and he fell without even realizing it. That's not to say Aang gets truly corrupted, because that's not in his character. He just gets far enough out of sync that he encounters difficulty.