To me it seems more like an expansion of COD4, more campaign, new multiplayer levels, different guns, and a few other things nothing that's really all that special I don't think it is worth the $60 because its like taking an old (but still good) game and just adding some new stuff and re-selling it.
I feel the same way, in fact I would rather see them develop some nice new maps and some more guns, maybe a new army, some higher ranks and then box it as a $30 expansion for COD 4. Those 4 maps that got released "recently" really are not overly big, like killzone (nad fest), creek (sniper fest), chinatown (carentan again?) only broadcast was really half decent. What Im saying is this crap with releasing what really is a $60 expansion feels like a rip off. Considering BF2, and I mean EA has there own problems but the expansions they released and the new weapons that were still playable in the original version were pretty popular.
Either way, Im really not excited about this game and I think that Left 4 Dead, Far Cry 2, and some other titles due out very soon are going to drain the community anyways. IMO