More D&D settings coming, including 3 classic settings that they are currently working on.
https://youtu.be/amw5rLAjqi8
Personally I really only cared about the final panel of this video, it's the most important panel because it's about the future of D&D including future products so it's even more important then the Frostmaiden/Tasha Panel.
Okay so the 5 big things is they have new product categories coming including Anthologies which they will use to nurture DMSGUILD talent for their freelancer pool, more settings (including 3 classic settings being worked on right now), more experimental stuff doing things adventures haven't done before, more products for casual players, and finally more, D&D MtG collaborations.
So for the 3 classic settings the first two seem obvious. The Forgotten Realms will FINALLY get a proper Campaign Setting Guide to tie into D&D: Adventures in the Forgotten Realms MtG card set, we've already tasted the two Ravenloft subclasses (although I still think Ravenloft will share a book with Innistrad, it's just too much consequences given that MtG is getting two Innistrad sets next year right after the Forgotten Realms set).
The third Set is the mystery, it or Ravenloft/Innistrad could come out in early 2022.
I'm hoping the 3rd one is Planescape to help deal with the Cosmology changes of merging MtG and D&D Settings together.
Plus I still think Zendikar could get a full Campaign Setting book early next year, as MtG designated D&D inspired setting.
I also think to achieve their goals the amount of products released yearly will need to increase. Firstly they want to pull more talent/writers in to their talent freelancer pool,, and that only works if there are more products to work on, otherwise that is a very increasingly thin gruel for everyone if there are more writers, but not more things to write.
Secondly they have clearly more ambitious goals now because of how D&D 5e has exploded in success. This us likely why Hasbro took Avalon Hill off WotC's hands, so they could focus on their core brands of D&D & MtG (DDMG) and increase productivity.