There isn't any multiplayer (Although one of the questions I'd wanted asked is if they'd at least considered it). And it's never too early to commit to DLC these days. Thinking about it, though, it's probably best not to announce plans for any of it before your game is released, like what happened with some next-gen platform releases recently.
People tend to think you're a stingy, money-grabbing bastard if you're announcing extra content months before the game's released which could just be put into the game to start with, so, y'know, good call, CA.