In Microsoft's E3 2014 press conference, a video was shown of a new Spartan learning about Master Chief before being sent to track him down and recover him. 343 Industries has revealed more information about this mysterious figure as well as what gamers can expect in Halo 5: Guardians.
The Spartan's name is Agent Locke. While Halo 5: Guardians remains a tale of Master Chief, the history of Agent Locke will be the focus of Ridley Scott's Halo: Nightfall series as he is the main character.
343 Industries was quick to clarify that Halo 5: Guardians is still the about Master Chief and not some new blood set to take his place. This will be about Master Chief finding his place in the universe even if it means defying the UNSC to do so. 343 Industries also stated that Master Chief's past is the very key to his future.
Halo 5: Guardians will release in 2015 exclusively on the Xbox One.