Symbol on Forerunner structure in Xbox Live??

Anyone else wondering why a symbol found in the Classified Codex is squarely marked on the Forerunner structure in the Halo 4 promo on Xbox Live? You’ll notice it when you move between each section.

Is this the start of a some hidden easter egg?

I don’t normally bump, but the board is rocking today ( I just posted this it’s already on page 2) and that symbol is prominently marked and might be of interest.

Last bump, I figure the secret code hunters will be tearing everything apart by tonight. But make sure you jot that symbol down, they just don’t slap those on art like that for no reason when their trying out some super secret decoder ring they’ve been working on for a title like Halo 4.