Board Thread:Lore Discussion/@comment-10993011-20150710065628/@comment-6881629-20150710103752

Neloth refers to the Nerevarine as he in a conversation in Dragonborn, as for the HoK becoming Sheogorath see the thread here.

I doubt we 'll actually see previous heroes, they'll probably stick to just mentioning them in books and rumors (but i would never have guessed there would be a card game).