We recently learned from a Ubisoft earnings call that the French publisher has canceled at least four games and delayed several others, including Avatar: Frontiers of Pandora. In the same call, Ubisoft mentioned that it had delayed a "smaller, premium unannounced title." If we believe a new report, the game in question is Assassin's Creed Rift, the still-unrevealed offshoot from Assassin's Creed Valhalla that eventually became a standalone title.

Bloomberg News claims that Ubisoft Bordeaux asked to push Rift's release date out of the company's current fiscal year to May or June 2023 because it is "far behind schedule."
Ubisoft originally planned to release Rift as an expansion for Assassin's Creed Valhalla. However, when it became too big to be a DLC, Ubisoft decided to turn it into a standalone game. We don't know much about Rift except that Ubisoft is still keeping it in secret and it will be set in the Middle East with Basim in the lead.
Hopefully, Ubisoft will still reveal Assassin's Creed Rift in September. During the franchise's 15th-year anniversary, Ubisoft teased that it will talk more about "the future of Assassin's Creed" in September.
As for Ubisoft, the company still has at least two big games coming later this year. Mario + Rabbids: Spark of Hope will be out by October while Skull and Bones will set sail starting in November.