In speaking with Gameranx Konami's Dave Cox admitted that the DLC for Castlevania: Lords of Shadow was a mistake and an afterthought.
"The problem was that the game's success caught everyone by surprise. It caught senior management by surprise and they wanted us to do DLC. We never planned to do DLC, so we ended up doing DLC after the fact and in hindsight that was a mistake. It was rushed. We had to rush it to market."
"I think we enriched the story that we wanted to tell, but I think if we were going to do DLC again it would have to be planned right from the get go. And it wouldn't be something that would try to build upon an ending-it would be something that's perhaps a side story that enriches the original story. If we were going to do DLC again it would be something much more carefully considered."
If we read between the lines here it's obvious that Mercury Steam already have plans laid out for DLC when it comes to Castlevania: Lords of Shadows 2 and hopefully those will fare better than the DLC for the first game.