https://wccftech.com/xbox-game-pass-ubisoft/

Multiple Ubisoft games may be added to the Xbox Game Pass by the end of the year, according to rumors circulating online.

As reported by AltChar, known Xbox insider Shpeshal Ed revealed that he received confirmation that multiple games published by Ubisoft will join the Game Pass library by the end of the year. As for which titles will be coming, he is not sure it will be the entire uPlay + library, but he guesses it will be everything up to and including Immortals Fenyx Rising.