I do not want to see a MP mode in ME3!!!!
It would just take away from the concentration that should go into the Single Player story.
Mass Effect is just fine without multiplayer...we don't need Coop either.....just one person, being their own Shepard, in an AMAZING story, saving the galaxy.
It is a perfect game as is without multiplayer, it doesn't need it, ME and ME2 didn't need it.
No MP for ME!!!
I would much rather have the effort and money go into more explorable planets/more detail and expansiveness of the galaxy