I was thinking along the lines of a transport vehicle, like the falcon for instance. Here's my thought:
There's a pilot seat, one gunner seat on the right, and like 3 to 5 passenger seats. The gunner seat should be on the right for the fact most of the time you exit on the right, including campaign, but not only that there could be a co-pilot seat. The co-pilot could use something like an MAV bot or a tagging system to help point out enemies, for instance, (like the reach multiplayer falcon) where in the campaign is a gun there could be a camera in multiplayer uploading video feed of the area to any nearby teammates that the co-pilot could control.