November 15th, Microsoft and Bungie announced a 60 second teaser ad to air on ESPN duing Monday Night Football. The ad will air December 4th, which is next Monday. Shortly after, the ad will be available on Xbox Live Marketplace.

For Europe, the ad will be aired simultaneously on Xbox.com. Developed by McCann Erickson, the advertisement will supposedly offer a unique and compelling look at Master Chief and Halo 3. Below is a screencap.