Here's an overview of this December 2021 release:
Dominion: Allies contains 400 cards, with 31 new Kingdom card piles that contain allies who will do favors for you and split piles that you can rotate.
—Oak, by Wim Goossens — October 2021
—Palaces of Carrara (remake), by Kramer & Kiesling — December, 2021
—Camargue (working title), by Franz Couderc — January, 2022
—Lord's Land (working title), by Kramer & Kiesling — March, 2022
—Hippocrates expansion, by Alain Orban — May, 2022
—Pixie Queen expansion and big box, by Rudy Seuntjens — October 2022
• Designer Max Wikström has written designer diaries about many of the aspects of the 1-4 player co-operative fantasy game Agemonia, which is being Kickstarted by Finnish publisher Lautapelit.fi ahead of a planned 2022 release.
• HABA is expanding its "My First..." line of products in 2021 with My First Advent Calendar, and while this item isn't a game, I'll be darned if it wouldn't make an ideal expansion for the Animal Upon Animal line, possibly with players taking turns to draft critters prior to the start of play.