Microsoft and 343 Studios have confirmed that Halo 5: Guardians will get a Beta release which will start on the 29th December 2014 and run through to the 18th January 2015. Access to the Beta is granted by buying Halo: The Master Chief Collection which comes out this November. The Beta will focus on the 4v4 arena gameplay across 7 of the games maps on 3 modes and will run at 60 fps on dedicated servers, 11 weapons and seven armour sets for Spartan customisation. There will even be some unlocks in the beta that carry forward into Halo 5: Guardians itself.
343 Studios also announced the Halo Channel for Xbox one and Windows. Showing all things Halo including Halo Nightfall, a lore and back story database, unlocks and rewards, community features and gameplay streaming from Twitch.