Update: Confirmed! Bungie has revealed that Marathon is, indeed, releasing on March 5, 2026. You can catch the trailer below to confirm just that, alongside some details on the collector's edition.
Original: The multi-colored cat may be out of the bag on the Marathon release date. A trailer, found sitting on an official Xbox forum, seems to reveal when the shooter will be playable, with the evidence hastily removed after players started spreading it around.
