I found this floating around the Interweb today. It looks like it was part of the story board for the teaser. It also looks like the Forerunner Artifact from the H3 trailer is the Ark. I always suspected it to be Ark, as no doubt many fans did, but this seems to confirm it. Now this could also very easily be completely bogus, so don't get crazy.
...but they got a pretty good habit of kicking people off their forums for stuff like this. Who knows, maybe they'll see this and comment on it.
It's true though. If you know the Halo story line then you know that it's the ark. Life started in Africa and Halo 3 takes place in Africa. The phrophets goto earth yada yada yada, to activate all the rings not knowing what they do (They think it's a super weapon, well it is but it kills everyone in the universe in the process so the flood have nothing to eat and therefore die). The only way to get rid of the flood is to take away their food.
http://carnage.bungie.org/
I think i've seen this before the H3 trailer came out. I dont remember, but i think it was halo.bungie.org via a link on their site.
It does have striking resemblance to the trailer though... so who knows !?!?
cool, nut to vague to be taken seriously.