I feel like I made this thread before but couldn't find it. If you watch the ELITE TV videos of the disc maps and DLC maps, you'll notice a lot of the time that when a player gets a kill, his name is "XRay Alpha". Using XboxGamertag.com (which is extremely accurate, as I've used it a lot for about a year now... it even shows when players are appearing offline.), I get a message telling me that it hasn't been created yet.
So when we're being told these maps are "all new", Infinity Ward is lying to us, as these videos were all recorded at around the same time. Disappointing, but unsurprising.