Board Thread:Skyrim/@comment-139.162.35.220-20160909093520/@comment-72.174.60.181-20160911202900

Also, regarding the Heroof Kvatch, yes they did replace Sheogorath, but it does state at the end in a conversation with Haskil that it is uncertain what that means. It is possible that the Hero was just a placeholder until Jygalag's curse retook him and he became Sheogorath again. The events in the Shivering Isles were just designed to stop Jygalagg from destroying the Isles again.