From the video description:
The legend continues with Magic: The Gathering | Avatar: The Last Airbender! It’s been 20 years since Aang was freed from the iceberg and it’s time to relive the journey to master the elements. Start your bending adventure and meet multiple incarnations of your favorite characters in special treatments and iconic moments.
Preorder Now – http://mtg.social/atla
Play Early at Your Local Game Store – Nov 14
In Stores Everywhere – Nov 21
Edit: Looks like they have a video up now discussing some of the cards and new ideas in this set:
@frank @garretble fortunately they’ve made the decision easy by making 3 of the sets universes beyond.
I know I’ll be mostly ignoring all the UB stuff
this is definitely what I’m doing. I did get a UB precon once, but it was before they shifted to UB being half the sets. not going to get any more UB stuff, on principle
@TheMagicer I was annoyed but okay with UB being commander decks because that individuality is kind of what they’re for. But my line was regular sets. Not a fan