I'm loving this idea. Here's my take on what i'd like: Allowing for multiple starting points, eventually the player can pass by the western watchtower where they are attacked by a dragon. With the help of some guards from white run and some random traveller on the road you defeat it. Then the dragon's soul goes into the random traveller, hence they are the dragonborn. Now unfortunately they have been given this responsibility, yet are far too feeble to accomplish anything on their own (basically a plain clothed npc with ability to learn and perform shouts, but sucks at all else, Frodo-esque). The guards quickly usher dragonborn back to whiterun, we hear "dovakiin!", and the player can go retrieve the dragon born as a follower to lead up the 7000 steps and protect as they discover their destiny, or the player can just go on about their business, leaving the essential, yet nearly useless dragonborn waiting for help. Additionally, it'd be rather fun to have the dragonborn become more combat agressive as the game went on and they learned more shouts. Initially they would run from combat, but return to you once the threat was gone, eventually they'd harden a bit and try to support the player with shouts. They would never wield swords or posses magic, but they could use shouts in combat, and take quite a beating before crawling to safety. Eventually, by us as the player leading the dragonborn to learn more shouts they'd be able to step up to the task of fulfilling their destiny, letting us sit back and watch the world be saved. Very much a LOTR style twist to the story, but I think it would be quite fun to play.