The new 2D animated series will consist of 26 half-hour episodes spread across two seasons, or Books 1 & 2 in “Avatar” style. News of the pickup comes as “Last Airbender” prepares to celebrate its 20th anniversary, with the original show having debuted on Feb. 21, 2005.

Seven Havens," the next chapter in the mythology and adventure universe following "Avatar: The Last Airbender."

Today, Nickelodeon announced that the Avatar saga (which began with The Last Airbender) will continue with Avatar: Seven Havens, a new 2D animated series co-created by Konietzko and DiMartino and executive produced by Ethan Spaulding ( Mike Tyson Mysteries) and Sehaj Sethi ( The Winchesters ).