User blog comment:Jimeee/Bethesda Games Studios: "Moving to our next adventure"/@comment-4118072-20130415184717/@comment-4118072-20130415204454

But that's kind of my point, people don't (from what I've seen) want to fight the Dominion as a regular Joe which was what the Hero of Kavtch was just a regular nobody. They want to fight the Dominion as the all powerful Dragonborn as they feel it is his right to part in that fight.

Chances are that in Morrowind had there been hints of Dagon's plans and fights and skirmishes with the Mythic Dawn people would have thought the Nerevarine should be the one to help end the Oblivion crises.