hmm, I guessing the new series would be about Aang and Zuko trying to rebuild the world. And maybe Azula will rebuild an army. but... that's kind of what the last series was about, was it lol. Aang trying to defeat the fire lord and stop the fire nation. It could be about Aang and his friends on a quest to keep balance in the world, Zuko trying to find his mother, and some new threat (dunno what???) challenging the gang. Maybe Aang will find some survivng Airbenders????
I heard a rumor that they're doing a series of Avatar that takes place a 100 years later. Either that or a sequel one to Aang's journey like I said before.
Yes, Jet was killed. Do you remember when Jet said he would be okay, but Toph stated that he was lying? That was supposed to be sort of a hint along with Zuko asking if he died in the play.