The people of Ubisoft have released a video to hype up the fact that the PC version of Brotherhood - that multiplayer stabbing game of the series - will come with The Da Vinci Disappearance, which is the console DLC for the game. Which essentially means it's not DLC on PC, it just is part of the game. The clue to the details of this content is in the title: it's a single and multi-player mission which features the kidnapping of Leonardo Da Vinci. Presumably you'll have to rescue him, and dudes will get stabbed. Yeah, go watch the trailer, that is what happens. And it happens with style.
With that thought in mind, I suppose I'd better go and hunt for the scalps of indie devs at the IGF. Wish me luck!