The Last Airbender TV series, Seven Havens, have a release window? Do fans have to wait long for the next installment?

The Last Airbender," Nickelodeon is expanding Michael Dante DiMartino and Bryan Konietzko's beloved world with "Avatar: Seven Havens." The new 26-episode 2D animated series is in production and will follow a young Earthbender who learns she is the new Avatar after Korra.

The Last Airbender” with the greenlight of the animated series “Avatar: Seven Havens.” The new 2D animated series will consist of 26 half-hour episodes spread across two seasons, or Books 1 & 2 in “Avatar” style.