Update: Here's the video, enjoy!
With today marking Halo 3's first year anniversary, Bungie may have finally pulled the curtain on their long kept secret. Moving forward from images, Bungie has launched yet-another "teaser" video (we'll be posting it soon), ending with the following:
"Halo 3....Prepare to drop!"
As pointed out by Shack News, the Xbox Marketplace stated, ""High action and deep mystery await players in this new Halo 3 campaign experience..Prepare to drop!", regarding Bungie's latest teaser. The screenhot above from the video indicates that the new campaign may arrive on January 6, 2009. Again, we await any official word from either Microsoft or Bungie regarding this matter.