We've seen snippets of the show so far — now exult in the brand new trailer for Avatar: The Legend of Korra. This show takes place 70 years after the original series and stars Korra, a disciple of Aang's son Tenzin. Alas, no firm date has been announced yet, but Korra should air sometime this year. Behold!
Via IGN. Hat tip to Syafiqjabar of Mars!