^I'm speculating. It could be anything.
No I know. I thought the same thing for a while. It would make sense when you think about it. I don't think they want to show off the same demo. I'm thinking the demo will be a late game level, part of the closing.
They said in an interview that the demo is NOT Pittsburgh or Lincoln. I'm still going by my gut feeling that it's an MP demo.
Maybe the two slots are for an MP demo, and a SP demo? A little bit of both? Who couldn't go wrong with that.