Microsoft announced Age of Empires II: Definitive Edition is coming later this year and will be available as part of Xbox Game Pass at launch.
Age of Empires II: Definitive Edition includes 4K textures and fully remastered audio, which means the game will be played best on the Xbox One X. Additionally, this new version of the game will include a new campaign called The Last Khans.
Microsoft also announced Xbox Game Pass Ultimate, a new all-in-one service combining Xbox Live Gold with Xbox Game Pass for both Xbox One and PC. The service is available for an introductory rate of $1 for 1 month.
Source: IGN.com Age of Empires II: Definitive Edition Announced