I don't think they're related. If you want the short version:
You're the neraverine, basically the savior of morrowind. You've been prophesied about and people are expecting you. You spend most of the game trying to prove that you are the neravarine. At the very end, though, and in the expansion packs, it moves more toward the "gods"of the game (who are really mortals themselves) betraying everyone, and you kill them. There's also some political intrigue, as the ruling powers are corrupt and you're supposed to oust them. Strangely, after you do that and "save the day", no one thinks you're better for it. They all still talk about the way the continent used to be.