Long ago, the fandom of the hit children’s series “Avatar: The Last Airbender” lived in harmony, but everything changed when the impulse to expand the series attacked. Since the animated show ran on Nickelodeon from 2005 to 2008, the franchise has expanded to include the much derided M. Night Shyamalan live action movie adaptation “The Last Airbender”; the animated sequel to the TV series “The Legend of Korra”; and now, Netflix's live-action adaptation of the original series with Albert Kim as showrunner.
