So, I was surprised this wasn't posted yet, but Legend of Korra is coming out in less than a month. A trailer was released a few days ago and it looks pretty awesome.
http://www.youtube.com/watch?v=jmsT6...layer_embedded
http://www.youtube.com/watch?v=jHuD28tLfqo&feature=related
http://www.youtube.com/watch?v=oYVSWkg_k9c&feature=player_embedded
Also, episode 1 has apparently been leaked somewhere on the internet.