Avatar fans will have something to follow once again next year when Avatar The Last Airbender: Legend of Korra start airing.The Last Airbender: Legend of Korra mini-series is a sequel to Avatar: The Last Airbender, which aired on Nickelodeon from 2005 to 2008.
Avatar: The Legend of Korra is expected to air on Nickelodeon in 2012.
Watch Avatar: The Legend of Korra teaser trailer
The teaser shows us Korra, where the series will be focusing more of her. Korra is teenage female protagonist from the Southern Water Tribe and the current incarnation of the Avatar. She has already mastered the elements of Water, Earth, and Fire, but needs to master Air. - via Legend of Korra