Board Thread:Lore Discussion/@comment-13436964-20130726062712/@comment-2.28.234.61-20131005205100

the hero of kvatch became sheogorath so he became imortal and the nerevarine got corprus and took a potion that cured the negative effects of the disease but keeping the positive effects.

since one of the positive effects was becoming immortal they may both still be alive today.

the last dragonborn may be immortal because he is the champion of hermeus mora and the previous champion [miraak] had lived in apocrypha for thousands of years so hermeus mora may keep the last dragonborn alive in a similar fashion.