Could all the Heroes of the Elder Scrolls be a part of a lineage of Souls that are in a constant state of CHIM. They are separate but whole, they are their own being that came into being during Creation. They can produce one or many Heroes. But it is the same Soul. For instance. The Nerevarine and the Champion of Cyrodiil are only about 7 years or so apart. They would have to be separate beings in order to maintain canon. The Prophecies of The Elder Scrolls do not appear cemented in until the actual event is happening right? It just is a huge fork of prophecies and then as a path is chosen it writes itself out to be completely accurate. Maybe it is just the formula for the correct hero to be made and that is why the Elder Scrolls are more like infallible Historical Documents than actual prophecies after the fact. I think I might be mistaken about the functionality of the Elder Scrolls though.
I think I may be on to something but then again I might just be giving someone a very good opportunity to further enlighten me in the whole relationship of the Heroes and the Scrolls as I am most likely insanely incorrect.
Or it could be Lorkhan I guess and they are all Shezzarines... Could there be multiple Shezzarines?
Hmmmm...looking forward to a response.