It may not be the feature film that Halo fans have been hoping for for the better part of a decade, but Halo: Nightfall isn't being taken lightly by those at 343 Industries or Microsoft - nor by those at Scott Free, the production company founded by director Ridley Scott. Set to introduce Halo fans the world over to Agent Jameson Locke (Mike Colter), a member of the Office of Naval Intelligence who will soon find himself tasked with hunting down the rogue UNSC soldier John-117 - better known to the world as Master Chief.

But before he can get to that task (and the upgrade to a Spartan-IV that will apparently come with it), he'll have an entirely different threat to handle. As the trailer seems to show, the Covenant (or what remains of it) have stumbled upon a new weapon in their efforts to eradicate human life from the galaxy. Exactly what that weapon is - or where they acquired it isn't clear - but the fact that it's only deadly to humans could be enough to cast aside the shaky truce delivered at Halo 3's end, and tip the scales against humanity once and for all.

Locke's mission, as the trailer implies, is to take his own team of soldiers into enemy territory and back on the offensive (with a recent behind-the-scenes trailer promising not one, but two alien locations fans can look forward to seeing brought to life). What strange new enemies await them, and what bearing they will have on the story of Halo 4 and 5, are still the real secret.

Taking place between the events of Halo 4 and Halo 5: Guardians, Halo: Nightfall follows the origin story of legendary manhunter Jameson 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.

Halo Nightfall Full Trailer

There's a good chance that even fans of Halo 4 may not have a good grasp on what story twists and mythology were packed into its campaign, so hopefully part of Nightfall's responsibility will be clearing up the confusion, before sending Locke (again, performed by Colter) after Master Chief in the upcoming game. With confusion remaining over just whose story Halo 5 will be, the plot and conclusion of Halo: Nightfall will be of significance to more than just those hoping to scratch the itch of a big screen Halo movie.

What do you think of the full trailer for Halo: Nightfall? Does it seem up to the standards you would hope, or is it the story and ramifications on the larger universe that matter most? Sound off in the comments.

Halo: Nightfall launches November 10, 2015. Halo 5: Guardians is expected to release for the Xbox One in 2015.

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