From Major Nelson:
The following ‘Oblivion’ content is available on the Xbox Live Marketplace for all regions:
Name: Knights of the Nine
Price: 800 Points
Available in: All Xbox Live Regions
Dash Details: A fallen King has been unchained from the darkness of Oblivion to seek vengeance upon the Gods who banished him. Only a champion pure of heart can vanquish the evil that has been released upon the land. You must heed the call, reclaim the lost relics of the Divine Crusader, and return the Nine to glory. New dungeons, characters, quests, and mysteries await.