Possible Switcheroo in Upcoming Dishonored DLC

Let the hype-train begin! Today, Bethesda tweeted this mysterious screenshot from Dishonored, with the accompanying text saying "Get Ready!"
Rumours have already started firing up across the internet. Could this turn out to be a sequel or prequel, a complete retelling of Dishonored's story, seen from the perspective of these mysterious Whaler Assassins? Could it be Daud's story? Perhaps it will completely change every assumption you had about Corvo, the Empress and the Assassins? ... Or will it just be another mundane challenge-map DLC?
For now, all we can do is wait. We don't know if it'll be a sequel, an expansion or a completely new game. We don't know the price, the date, or even when we will get to know more. So stay tuned, all you wannabe assassins! Because while you shouldn't just take my word for it, I believe something big is brewing somewhere in Dunwall.
Posted 12-03-2013, 21:00
... And I'm NOT talking about Slackjaw's diluted Elixir-Whisky.