Konami has announced via the official Castlevania: Lords of Shadow Facebook page that the game's DLC, Reverie, has been delayed for Xbox 360.
Here's the official statement:
Unfortunately, the "Reverie" DLC for 360 has been delayed due to a last minute issue which we hope to have fixed shortly. We understand that this news may frustrate you but please know we are working with Microsoft to resolve it as quickly as possible and give you the level of polish you deserve. We will update you as soon as a release date has been finalized and appreciate your continued patience.
Our apologies again for the delay and thank you for your continued support of Castlevania: Lords of Shadow.
Originally slated for February, the Reverie DLC was delayed into March before being released on PSN for PS3 users.
Komani didn't state the particular reason for the delay this time other than the Facebook statement, nor did it provide a release window.
We'll keep update you when we know more.