Board Thread:Lore Discussion/@comment-108.253.68.177-20131021030335/@comment-109.149.122.98-20170811110437

1. The Nerevarene is immune to disease, the Champion of Cyrodil isn't, so they can't be the same person.

2. Sheogorath is no more, he's now Jyggalag, the character you meet in Skyrim is in fact the CoC; Corvus Umbranox lied, the curse of the Gray Cowl wasn't lifted, simply transferred so nobody recognises the CoC as his true self, so he effectively becomes a clone of Sheogorath. Obviously it took time for the transformation caused by the curse to take effect, which is why for a time after the CoC becomes Lord of the Shiveruing Isles he is still sometimes recognised in Cyrodil.