ES4: Knights of the Nine - Preview @ IGN
IGN has posted a preview of Oblivion's upcoming Knights of the Nine addon:
It seems an eldritch evil named Umaril, an Ayleid Sorcerer-King, has started causing trouble again. More specifically, he's responsible for murdering the clergy of Anvil's chapel. After speaking with a rather energetic prophet on the streets of Anvil a questline kicks off sending you to nine shrines across Cyrodiil. Along with the quest you get a map that marks all the shrines' locations. Though fast travel isn't possible, the spots are easy enough to get to even if you're just starting a new game.
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