Board Thread:Lore Discussion/@comment-13436964-20130726062712/@comment-1470368-20141114195046

Just going to let people know that the Hero of Kvatch becoming Sheogorath isn't strictly confirmed as canon. We also don't know if the HoK was really there to aid Sheo during the Greymarch.

Sheogorath in Skyrim does give hints through referencing the events of Oblivion, like "I was there for that whole sordid affair". However, Sheogorath being the crazy ever-present Daedric Prince that he is...could've easily witnessed all of these events separate from the Hero of Kvatch.

For now, the theory that the HoK mantled Sheogorath is just that...a theory.