Dead Space 2 Will Extend The Adventure With Some Post-Release DLC.

Dead Space 2: Severed will enhance the main game's narrative by providing "two standalone chapters in the single-player game". The DLC will follow Dead Space: Extraction's characters Gabe and Lexine, and will run in parallel to Isaac Clarke's story in the main game.

No price or timeline was mentioned. Before you get all huffy and moan about this not being on the disc, please note that this content probably isn't finished yet. They're announcing it now to stop people selling back their copies of the game the moment they've completed the campaign.