Microsoft has announced that the currently in production Ridley Scott-produced "Halo" digital series will be entitled "Halo: Nightfall".
The series introduces a pivotal new character and serves as a prequel to the Fall 2015 release of the full "Halo 5: Guardians" game. It's not to be confused with the Steven Spielberg-produced "Halo" series which is currently targeting a Fall 2015 premiere.
Both 'Nightfall' and the 'Guardians' multiplayer beta will come with "Halo: The Master Chief Collection" which will be released on November 11th. Said collection includes "Halo" 1-4 all remastered for 1080p/60fps and including all the multiplayer maps (over 100).