Xbox and Halo Twitter accounts have begun teasing what appears to be an upcoming trailer for Halo 5: Guardians.

The Halo Twitter account tweeted the following video (or gif) informing fans that something is “coming August 31”.

Later, Xbox tweeted out another short clip of Spartan Locke putting his helmet on. The caption informing us that Halo 5: Guardians release date is 2 months away, and that a “mission briefing” will begin in 24 hours. 7pm PDT / 10pm EDT August 31st, 2015.

Stay tuned as the story develops.