User blog comment:Commdor/Rumor: ME3 to Feature 4-Player Co-op Missions/@comment-68.36.73.206-20110617041427

What about the idea of making the co-op take place within a "Matrix" like video game. I highly doubt multiplayer will tie into a player's story mode since there cannot be two or more Commander Shepards in one universe. Co-op could be inside a new "virtual game" on the Citadel or something, where Co-op is free to do what it pleases and simply call every Shepard "Player # (1, 2,3, etc.)"