Black Box, Black Ice and Negotiator Coming to MW3 in March
It looks like Activision/Infinity Ward have also given us some information regarding what to expect from the MW3 DLC in March. "Black Box" is a multiplayer map, while "Black Ice" and "Negotiator" are both Spec Op Missions. There is no official date for the March Content yet, but we'll be sure to keep you updated.
source: Content Calendar