There are a few ways Seven Havens could approach an Avatar with the twin. The first could be similar to the Katara-Sokka dynamic from The Last Airbender, where one sibling is a bender and the other sibling is not. How would knowing your sister is the most powerful bender in the world affect your sense of self-worth and your relationship with her?

The Last Airbender will continue with Avatar: Seven Havens, a new 26-episode, 2D-animated series at Nickelodeon.

Nickelodeon is set to release a new animated "Avatar" series, 20 years after "Avatar: The Last Airbender" premiered.