Ridley Scott is executive producing Halo: Nightfall, a live-action digital series that will bridge the gap between Halo 4 and Halo 5: Guardians. The latter game prominently features a new character, "legendary manhunter" Jameson Locke, who we'll be introduced to in the show.
Here's the official blurb for Nightfall: "...Locke (Mike Colter) and his team as they are caught in a horrific terrorist attack while investigating terrorist activity on the distant colony world of Sedra. Led by Locke, the Office of Naval Intelligence (ONI) agents are forced to coordinate with a Sedran commander with a remarkable history and deep-rooted mistrust of ONI. As the plot unravels, they’re drawn to an ancient, hellish artifact where they’re forced to fight for their survival, question everything, and ultimately choose between their loyalties and their lives."
Nightfall is directed by Sergio Mimica-Gezzan and will be out on November 11, viewable by way of Xbox Live and Xbox One compilation Halo: The Master Chief Collection.