The highly anticipated Halo Infinite will launch alongside Project Scarlett in Holiday 2020. We don't know much else about the launch lineup, but the system will support all existing Xbox One games, including the vast library of backward compatible Xbox and Xbox 360 titles.
Other titles confirmed or expected to be in development for next-gen consoles include The Elder Scrolls VI, Starfield and Grand Theft Auto 6, so it seems safe to assume that those will land on Scarlett as well. According to TechRadar, Rage 2 developer Avalanche Studios is working on a next-generation title.
During its fall 2019 earnings call, EA confirmed that it has a new Battlefield game in development for next-gen consoles (according toGameSpot). The publisher is also skipping this year's installment of NBA Live to focus on a next-gen version for 2020, as reported by Polygon.