Series 6: Raven

Season 6: Raven 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. The Season's name and emblem are referential to those of Fireteam Raven; themselves the namesake for the 2018 game Halo: Fireteam Raven and the origin for several new armor permutations introduced to the collection in the season.

Season content
Season 6 is expected to add some or all of the following content into The Master Chief Collection;

Halo: The Master Chief Collection

 * Custom Game Browser: a new way to play with each other in MCC
 * 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
 * The Exchange: a seasonal currency “store”
 * 24 new nameplates (including 13 animated nameplates)

Halo 3

 * One new map for Halo 3 from Halo Online; Waterfall
 * Three new techsuit customization for Halo 3:
 * GEN2 Azure
 * GEN2 Gunmetal
 * GEN2 Maroon
 * The Halo 3 original Spartan model is now available when the player has the toggle option for Halo 3 skins turned off.
 * Fifteen new animated Halo 3 visor colors:
 * Another Sunrise
 * Cool Depths
 * Neon
 * Burn Radius
 * Nebula
 * Old Salt
 * Patina
 * Plated
 * Red Shift
 * Shadow
 * Shoreline Sunset
 * Tall Tales
 * Turbulence
 * Uncontrolled Growth
 * Tropic Cove


 * Back accessory customization for Halo 3:
 * Tactical Pack
 * Demolitions Pack
 * Communications Pack
 * Ammo Pack
 * Pulaski
 * Sword and Board
 * Katana (standalone accessory, previously only available as the Katana permutation of Hayabusa chestpiece)


 * Six new armor permutations for Halo 3, originally from Halo Online:
 * COS-class Mjolnir
 * HAMMERHEAD-class Mjolnir
 * INFILTRATOR-class Mjolnir
 * LANCER-class Mjolnir
 * NOMDAGRO-class Mjolnir
 * RHINE-class Mjolnir


 * Four new ODST armor permutations for Halo 3, based on the ODST armors used by Fireteam Raven in Halo: Fireteam Raven:
 * ODST/COMM
 * ODST/DEMO
 * ODST/HVY
 * ODST/TAC
 * 9 new weapon skins and 13 new vehicle skins for Halo 3:
 * 2 for the BR55HB battle rifle
 * 2 for the SRS99D-S2 AM sniper rifle
 * 2 for the M90A shotgun
 * 1 for the M41 SPNKR
 * 2 for the MA5C assault rifle
 * 3 for the M12 Chaingun Warthog
 * 2 for the M12G1 Gauss Warthog
 * 2 for the M808C Scorpion
 * 4 for the M274 Mongoose
 * 2 for the AV-14 Hornet

Flights
Flighting for Season 6 was originally set to begin on or after February 18, 2021. The release was ultimately delayed, and Flighting began on the 26th. The Flight was designed to test Season 6 content in new features, though not all of it was available at the start. At the Flight's start, available content included;
 * Several new Halo 3 armor permutations.
 * Halo: Fireteam Raven armors.
 * RHINE-class Mjolnir from Halo Online.
 * Backpack accessories for Halo 3.
 * Two new multiplayer maps for Halo 3, originally from Halo Online.
 * Edge
 * Waterfall
 * Several new animated nameplates.
 * Several new Halo 3 skins.
 * In-game team switching

In an update later in the flight on March 11, the new season points store will be added alongside a number of bugfixes for the existing content. Due to player feedback, the map Edge has been delayed and will be released in a future season. Originally, this update for the flight was planned to add a custom games browser initally only supporting Halo: Reach, though this was halted due to time constraints. This update also changed the Sword and Board back accessory to be color-coded to the player primary color, replaced the crack in the skull on the shield with lacerations, and removed one sword and raised the model to prevent it from clipping with chestpieces.

Cut Season content
Season 6 was originally slated to release with two former-Halo Online maps. While Waterfall made it into the final release, the map Edge was cut from Season 6 during the season flighting, as 343 Industries felt the map needed "fundamental improvements" before release. The Custom Game Browser was also originally intended to debut in Season 6, though was eventually cut. The Sword and Board backpack piece for Halo 3 originally appeared in the flight with two crossed machetes and a blue shield, though in the updated flight build this was updated to just one machete and a shield inheriting the player colour.