Avatar: The Last Airbender is coming back with a brand new animated series following the events of The Legend of Korra, and the first details from the upcoming Avatar: Seven Havens tease that something terrible happened to Korra after her series came to an end.

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.

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?