I found a few Limited Editions floating around

I discovered last night in the first level of Halo 4 Campaign, there is a part where you enter into an airlock.  The door behind you closes, and you have to wait a bit for the door in front of you to open.  If you look carefully at the objects in the room, there are literally Limited Edition boxes of Halo 4 floating or laying around in there.  Same decals and shape of box, even the dented corner.  Pretty sweet!