suprised halo 4 wasn't ahead of black ops 2 preorders for the week. Anyway according to current preorder data from online sites.
gamestop has just the halo 4 limited edition ahead of ps3 version of black ops 2, and the normal edition of halo 4 right behind it.
Amazon has both the normal and limited edition of halo 4 ahead of both versions of black ops 2, the limited edition being way ahead.
Walmart has the limited and normal edition of halo 4 ahead of ps3 version of black ops 2.
I suspect another huge spike for halo this week, or black ops 2 dropping a lot.