Halo 4 Animated Key Art

The Halo 4 Animated Key Art is a 0:30 clip released by 343 Industries on Halo Waypoint. It shows John-117 when he has just crashlanded with the unto Requiem. On the background the wreckage of the aft section of the, there also seems to be some blue-purple structure of unknown origin or purpose. The design seems Forerunner, however this is pure speculation.