Series 6: Raven

Season 6 is to be a season for Halo: The Master Chief Collection, anticipated to release some time in 2021. As of November 2020, work had begun on Season 6 content. Flighting for the season will begin on or after February 18, 2021.

Season content
Season 6 is expected to add some or all of the following content into The Master Chief Collection;
 * Custom Game Browser: a new way to play with each other in MCC
 * 2 new maps for Halo 3 from Halo Online; Waterfall and Edge
 * FOV slider support for all Xbox One consoles
 * FOV slider will no longer be locked when Xbox Series X|S devices are set to 120hz
 * Double Keybindings
 * Mouse & Keyboard support for consoles
 * Advanced Audio options
 * View Model Customization options
 * Seasonal currency “store”

Additionally, several new armor permutations are visible in the Season 5 launch trailer, indicating this season may contain more Halo Online-origin armor.