When asked if and or when DLC would be released for the recently released Castlevania: Lord of Shadows, Producer Dave Cox responded with:
no firm date but Gabriel will return to the Castle and Laura will also return :)Mr. Cox confirms DLC but, due to the cursed 140 character limit, does not supply specifics about the DLC. I suppose this is no surprise since the reviews of the game have it marked down as a surprisingly good experience, and a sequel in the works that is "advanced", it should come as no surprise that DLC will be making its way to the marketplace.
Castlevania: Lord of Shadows was released a week before Medal of Honor and will probably be lost in the holiday season blitzkrieg of your wallet. There is a demo available on the marketplace.
We've got the full list of Castlevania: Lords of Shadow achievements - check the list for guides to unlocking them.