Looks like the soldiers are river dancing. I prefer this rumored cover, but I guess it's been debunked.
I just like how simple it looks, every FPS cover always seems to have a cluttered mass chaos direction. Something like this would grab more attention much more than the dark black art-even if that represents the game.
Examples of "cluttered mass choas covers!" (Taken from Neogaf)
That official cover seems pretty standard, to where it may not grab the attention from the uneducated it deserves.