The character development and writing can match even some of the best television writers out there, it may even be able to stand toe-to-toe with the works of Joss Whedon. I wouldn't doubt that the next 3 seasons are already written. Several people involved with creating Avatar, including designer Joaquim Dos Santos and composers Jeremy.
It was created by Bryan Konietzko and Michael Dante DiMartino as a sequel to their series Avatar: The Last Airbender, which aired on Nickelodeon from 2005 to 2008. The show itself is also planned out, as minor questions formed in one episode may not be answered for another 10 some episodes later, so it's not just another Nick "story" show like Danny Phantom, all episodes are connected and well planned out. he Legend of Korra is an American animated television series that premiered on the Nickelodeon television network in 2012.
The bending styles all coincide with different styles of fighting and can be seen in every episode. The research put into the story is amazing. It's good to know that children that watch this show may actually learn what it takes to have a good story. Nickelodeon also released the first part of the second episode of the series for online viewing on April 2, 2012, twelve days earlier than the television air. Not since Samauri Jack has an American show been able to pull off an anime style that works. This show is what Nickelodeon needs to give it some respect. The art and research put into this story matches the quality of the plot and character development.