The Master Chief Collection came out last year to refamiliarize players with the series' first trilogy. The collection appears to have done its job very well, as it'e been a popular choice among gamers throughout the holidays and into the New Year.
343 Industries, who developed Halo 4 and revised the original trilogy for release on the Xbox One, has done an amazing job of providing post-launch support for The Master Chief Collection. They recently published a new update for the game that brings new modes to the multiplayer segments of the title:
The Halo 4 and Team Hardcore playlists are now available in Matchmaking. Team Hardcore currently includes Halo 2 Classic game types. Halo 3 tournament-approved game types will be integrated in a future update. Other fan favorite playlists are also in the works, including Team Snipers, Team Doubles, an objective-only playlist, and more – stay tuned for details regarding when these will become available as featured playlists. As always, playlists data and feedback will determine which playlists become permanent additions to the playlist lineup.
They have also revealed that they are hard at work on another content update that will "include improvements to UI, Matchmaking, game-specific multiplayer items, controls, and more."
You can stay up to date with all things Halo by watching Halo Waypoint.