The multiplayer could be great, in which case I will be the first one to extol the virtues of such a new feature. At the same time, does anyone really see this becoming a huge multiplayer sensation along the lines of Call of Duty or Halo? I don't want to see resources taken away from a single-player project in order to put something into the game that has a limited lifespan. Does anyone play Bioshock 2 for the multiplayer? Will people still be playing Assassin's Creed: Brotherhood three months from now? I could be wrong, and Mass Effect 3 could end up featuring the best multiplayer this side of making love (the best multiplayer experience ever, IMO), but I doubt it. As long as this development doesn't hurt the quality of the single-player campaign (which is impossible to judge because we will never play the "could-have-been" Mass Effect 3 with only single-player) then we have no reason to complain/worry.