One of which has a trailer: Halo: Nightfall is webseries of five episodes produced by Ridley Scott that will be available exclusively on Xbox since November 2014. It will spin off from the hit series of first-person shooter games, which are focused around a super-soldier called the Master Chief fighting off an alien invasion through a variety of space-age weaponry.
Halo: Nightfall introduces a pivotal new character, Jameson Locke (played by Mike Colter), a legendary manhunter and agent with the Office of Naval Intelligence (ONI), Earth’s most powerful and secretive military branch. When he and his team are caught in a horrific biological attack, they unravel a plot that draws them to an ancient, hellish artifact, where they will be forced to fight for their survival, question everything, and ultimately choose between their loyalties and their lives. The webseries take place between the events of Halo 4 and Halo 5: Guardians and it is Locke’s origin story which will lend insight and understanding into the character he becomes in Halo 5: Guardians. The Master Chief doesn't feature in the trailer, it focuses on several United Nations Space Command soldiers who back the player up in the game. They appear to discover a mysterious alien threat.
You may recognize Christina Chong, known for the Doctor Who episode A Good Man Goes to War, who recently was cast in Star Wars: Episode VII as Macer.
