This sequel is set about 70 years after the original and features Korra, a girl who is the new Avatar. She's learned Water, Fire and Earth bending and now seeks to master Airbending from Aang's son, Tenzin. The series will air in 2011 and the interveiw about the upcoming plotpoints is here;
http://www.comicbookmovie.com/fansites/GambitsCorner/news/?a=20364
http://www.comicbookmovie.com/fansites/GambitsCorner/news/?a=20364