https://www.pcgamer.com/assassins-creed-creator-says-1666-amsterdam-is-still-happening-for-sure/

Assassin's Creed creator Patrice Désilets is busy making prehistoric survival game Ancestors: The Humankind Odyssey, the first game from his Montréal-based studio Panache. But his next project may well be 1666 Amsterdam, the IP he sued Ubisoft for control of in 2013, he revealed this week.

Désilets was initially heading up the development of 1666 Amsterdam, an open world game about the devil, at THQ Nordic. The studio folded in 2013, and was purchased by Ubisoft, who Désilets had left back in 2010. Ubisoft therefore had control of the project. They then fired Désilets, who sued to gain full rights to the game, which he eventually did in 2016.