It could be similar to the rush game mode where the attacking team is pushing the other team back while destroying specific buildings (instead of MCOM stations). The last part for the map will be a huge enemy building (like a capitol building of the city/country). This final building requires a lot more firepower to take down or the attacking team can destroy it from the inside by detonating C4 on 4 or 5 of the buildings main support pillars. Enter the building from the ground floor (2 or 3 entrances) or enter the building from the roof via helicopter (or jet for you stuntman out there). 

Both teams (or one team) has a carrier that must be destroyed by either hitting it with missiles/bombs or taking it out by infilltrating it and blowing it up from the inside. 

NOTE: These are just examples of the mode.