We work in the dark…
— Assassin’s Creed (@assassinscreed) 10 September 2022
The trailer only showed the Assassin’s logo made of sticks hanging from a tree in a dark forest. No official time period or setting was given. It becomes a part of Assassin’s Creed Infinity, however, the live-service hub for the series and is only “on the horizon,” meaning it has no official release window. Ubisoft Montreal, the studio that led Origin and Valhallaalso leads this game.
However accurate reports who revealed this game’s existence said it took place in Europe during the Holy Roman Empire. The reports also talked about witch trials, which this trailer suggests.