I think there should not be another Dovahkiin of your race somewhere else in Tamriel (are we expanding this to all of Nirn?) as that just makes you an exception, which you are not. You are Dovahkiin, like many others have been, though you just happen to be more succesful (besides already knowing of your blessing/birth-right). Other thoughts: Also, a general thought about the Acts: I don't feel that this mod should envision a HUGE change or power-gain for your character as, yes you defeated Alduin and removed him from Svongaarde, but still, you are not the only Dragonborn in history. What makes your character the one who ends it all? I think that this mod should at least lightly set the stage for another conflict towards the end of it and should not involve wiping out the Thalmor, but rather defending Skyrim from their invasion. The defense in itself can be long and filled with town/region specific content, rather than just "Defend this fort" (add twists to each battle and different leaders/objectives to end each fight). For example the fight in Whiterun would be towards the middle of the Thalmor invasion and would involve you watching from the Throat of the World as the city was approached by an army. You would lead your men to attack the army and would have to wipe out giants and ultimately man the walls. In other locales like Solitude or Winterhold where the city is above the sea, the battle could be fought over sea and could be an aerial battle the whole time, and unlike Whiterun, you wouldn't deal with giants and instead would deal with archers from INSIDE and ON TOP of the city walls in Solitude and Thalmor mages in Winterhold.