Bungie says in their weekly update that there is a Halo 3 documentary coming, detailing the making of the E3 trailer last month. Bungie composer Marty O’Donnell hinted last week about the documentary. That has now been confimed.

“It was supposed to be a surprise, but since the man himself gave it away, we can in fact reveal that we have a documentary short that shows the process and people involved in making the E3 trailer, complete with some never before seen scenes (think angles, really) from the trailer. This was the goodie I had hinted at in a previous update.”

There is no mention when the documentary will be out.