The update, which has since been delayed, was planned to fix many issues with the current in-game matchmaking system. Whilst 343 Industries did mention that they would release the update this month, new plans reveal that most players will not get to experience the update at all.
Before full release, the matchmaking update will be pushed to a select few US beta participants, and these members will be able to help stress test the matchmaking before it is finally rolled out globally.
To enter the beta process and be in with a chance of entering the matchmaking beta, you must reside in the US and join the Xbox One preview program. 343 Industries gave a small statement about the update.
"In recent weeks, we have been conducting extensive internal testing of an upcoming content update for Halo: The Master Chief Collection."
"Given the scale of the update, which includes changes to the matchmaking experience and party system, we are expanding testing to include select members of the Xbox One Preview program to ensure the official release is the best possible experience for all players.
"The content update beta test is open to Xbox One owners within North America who have a copy of Halo: The Master Chief Collection and have opted-in for Xbox One beta testing as part of the Xbox One Preview program."
"This is an opt-in opportunity and the content update will only be made available to selected participants within the Xbox One Preview program, based on the highest levels of engagement with Halo: The Master Chief Collection. On Friday, January 23, participants selected will be prompted to download the content update automatically when the title is started."