Australian site, Xboxoz360-gamer, will be posting the new Bungie announcement as it happens. Background story to the big announcement.
"Bungie has been teasing gamers with the prospect of a new IP since E3 when their Official Announcement" was pull by MS Head Office moments before it was supposed to become public with the explanation that the announcement was for a "dedicated event" in the future and would serve no purpose if it was announced now. hmmm…."
"Well the Bungie site is again on countdown and will be made public 12 midnight September 25th Aust Eastern Pacific Time. That's the time we will be informing you all as to what the HUGE secret is all about. We'll keep right on the ball and as soon as it is revealed, the notice will go live for all to see. So we'll watch the clock for you, you just tune back in"
Well it’s a teaser trailer to a unspecified game which they have yet to announce a title. It has to be about the Orbital Drop Shock Troopers. Its set in 2552 in New Mombassa. Clearly says Halo 3, so likely an expansion of sorts?
Easy access to teaser trailer for analysis.