“This video is a cool little thing our video and audio team threw together to give you a glimpse into some of Halo 4’s concept art, atmosphere and aesthetic ideas. Although you shouldn’t get too attached to any of the specific ideas or scenarios in here, it does represent some of our early, current and ongoing artistic effort.”
This was said of the concept art trailer, Are the saying some of the music and art we saw and heard @ the Halo 4 panel recently won’t be in the game?
The art can change. The trailer was only for the fans to get a sense of what coming.