Board Thread:Lore Discussion/@comment-7224639-20130409093055/@comment-173.46.77.189-20161121094147

See, I think it's none of it. I think the dragonborn' soul will be reincarnated like it had been before. Assuming the theory regarding DB = Shor incarnate is true, the DBs soul would return to Lorkhin and the last dragonborn would be the last. If you read The Book of the Dragonborn ingame, then you'd know that being dragonborn is passed through lineage, and there were multiple lines of dragonborns (I.E, Alssia, Reman, Septims, character, etc.) Hence why, in the Hearthfire add-on, your character adopts and doesn't have their own.

So to recap, screw Sithis, the DB is Shor, and ain't no going back.