Board Thread:Lore Discussion/@comment-26895123-20150816032605/@comment-72.223.73.205-20161231195221

Late to the party here, but as pointed out prior, Bethesda themselves have confirmed the CoC is the new Sheogorath -and there's no hint that the old Sheogorath is the new Haskill. Which means the way Haskill mantled Sheogorath and the way the CoC did are fundamentally different. Haskill's mantling did not stop the Greymarch, even if he successfully took over as Sheogorath, but as confirmed by Jyggalag, the CoC's mantling did. So the question isn't whether Jyggalag is dead, or if the CoC's Sheogorath is going to turn into Jyggalag -they're now very much both alive, and both separate beings (although Jyggalag likely has not made any attempt to reach out to Mundus in the meantime, giving his absence from Skyrim). The question is what is the difference between the way it happened?

Personally, I think Haskill could very well have succeeded in taking upon himself the mantle of Sheogorath -the CoC officially does so when the new staff of Sheogorath is completely made (it is a symbol of Sheogorath's authority, and the old Sheogorath explicitly states his desire to give it to the CoC). However, Haskill failed to stop Jyggalag, who being cursed to become Sheogorath after the Greymarch succeeded, shattered the newly-mantled Sheogorath into fragments, and when returned to his cursed form, turned that those fragments into Haskill (who himself acknowledges his existence as such, as a Vestige), to act as a servant with the all-important duty of guiding the next champion such that they do not fail to stop the Greymarch.