Bethesda has just announced 3 new and unique packs, 1 arriving in December and the other 2 scheduled for 2013. For a welcome change they will be released simultaneously (ahem, ahem, Skyrim) on Xbox PS3 and the PC.
For know we only have detailed information on the first two packs. Dishonored: Dunwall City Trials, the first and earliest pack, is set to cost 4.99$, or 400 Microsoft Points. It will contain 10 challenge maps, each one featuring a unique element, such as a arena battle against waves, or free-gravity stunts. Ontop of this it contains brand new achievements and trophies.
The second pack, which is yet unnamed will focus on a group of supernatural assassins (like you) called “The Whalers” led by a man called Daud. You wil get new weapons, powers, areas, and decisions in this story driven game play.
The final pack is yet to be fully announced and more details are expected nearer to release.