Board Thread:Lore Discussion/@comment-13436964-20130726062712/@comment-6881629-20130728123237

The way Vampirism worked in Morrowind the Nerevarine couldn't have been a vampire but durring the main story the Corprus disease they catch makes them imune to time and disease also remember the Nerevarine was mentioned in Skyrim as having gone missing in Akavir so there around but missing in action.

Its very possible the Dragonborn did meet the Hero of Kvatch as most people think he became the Sheogorath you meet in the Skyrim Quest.