Maybe closer to rotation so there aren't the same cards in every brawl deck. I know there wouldn't be the same cards exactly, but maybe they want more variance year to year, or every other year for that matter.
Maybe it's just because I don't know all the lore and whatnot, but seemed pretty underwhelming to me. Definitely liked the Eldraine trailer a lot more.
https://magic.wizards.com/en/articles/archive/feature/where-find-theros-beyond-death-previews-2019-12-13
Oh perfect. I didn't have the sound on because I'm at work haha
Edit: Just kidding, I just didn't finish the video *facepalm*
It could be one of the $39.99 packs. I hope not, but it could be