Last week, Todd Howard, Executive Producer of Oblivion, declared in an interview that the PS3 version of The Elder Scrolls: Oblivion will feature some new EXCLUSIVE content, but today came the announcement that the promised new content will be available for the Xbox 360 and PC versions also.
The new ad-on, called the Knights of Nine, will be available for download, starting with November 21 via the Xbox Live Marketplace and via the official Oblivion download site. As an additional bonus, the retail version of Knights of Nine will feature a compilation including all the Oblivion downloadable content released up to date. Ad-ons like The Orrery, Vile Lair, Thieves Den, Horse Armor, Mehrunes' Razor and Spell Tomes will soon hit the shelves.
But the PS3 version of The Elder Scrolls: Oblivion will have the Kinghts of Nine ad-on included.

What will Knights of Nine bring extra to Oblivion will be a new faction and related quests. Players who try out the new ad-on will have to defeat a sorcer-king and his demonic minions and will be able to take from themselves the holy amour and weapons of the Divine Crusader.

A price for the Knights of Nine ad-on has not been announced yet.