Off the top of my head, pretty sure BC2, Homefront, MoH and MAG all offered pre-order "bonuses" that were just unlocked early or later added. I hope they do tbh, I was torn between Spec Ops and Psycho. I'd probably even pay.
Yea, alot of games give them as a DLC later on, but still, personally i would like if they kept it exclusive. But hey, it's there choice to make it as a DLC and make a profit. I just like feeling special with something others don't have or can access :3
Tho....i would like that awesome revolver from the psycho pack....
They might, and they might not, alot of game devs do it, but SD isn't just another game developer are they?
If they gave pre-order people something small like an exclusive T-Shirt ingame or something like that, i wouldn't mind if they made all the other things a DLC later on.