Have they ever put nukes, choppers, ac130's or pro perks in a GAME before? Not DLC
If they changed the actual game so much , why not out new things in the dlc?
well remember the fact that there is around 4 or 5 guns in story that are not in multiplayer, i doubt it would be hard to transfer the guns with a few changes in power. these guns are mainly from cod 4.
These guns are :-
SVD Dragunov (found in a few missions on spec ops & story)
M1911 a1 pistol (found in the Museum)
W1200 pump action shotgun (found in Museum, someone is holding the gun)
M14 without Scope (found in spec ops mission "Breach & Clear")
AUG para Scoped (found in story & spec ops) <- my fav