https://www.overclock3d.net/news/software/halo_infinte_rumoured_to_target_holiday_2020_release/1 Rumour has it that Microsoft plans to reveal a lot of information about Halo Infinite, including the game's Holiday 2020 release target. Halo Infinite is designed to be a cross-generational title, launching on PC, Xbox One and on Microsoft's next-generation Xbox console simultaneously, making the game playable for users of current-generation and next-generation hardware.
At E3 2019, Microsoft will release a new trailer for Halo Infinite and detail how the game will play, though, given its late 2020 release target, the game E3 showcase is likely to be short and sweet.