User blog comment:Kaloneous/Mass Effect 3 Ending DLC Denied and PAX/@comment-4118072-20120318222722/@comment-4043223-20120318224520

It would just be shepard, at this point he is the figurehead, the leader of the remaining forces on the ground so a co-ordinated strike may have been possible as a boss fight if done correctly.

This guy explains it the best: http://www.youtube.com/watch?v=HUqAhKW7498