User blog comment:Icemoomoo/What happens to the Dragonboren after he is dead?/@comment-1726879-20111206171904

The Dragonborn will simply be fought over by those whom he serves. All of them have claim to him, so really it's one of a few ways, either the dragonborn chooses, the spirit is taken by the strongest entity, or simply part of him/her gets put in each of the places.