User blog comment:Frantruck/Starting shout?/@comment-206.190.67.230-20111102060310

I think that being the Dovahkiin is more that you were born with the power to wield the dragon's power, not that you were born with it outright. Additionally, the trailer mentions that you're the 'One They Fear', I would think that the reason for that is that if a dragon sees you using a shout, it immediately knows that some of its own kind have already fallen to you.

Thus when the Dovahkiin in the trailer lets off the FUS DO RAH, that dragon knew immediately that at least three other dragons have already died at his hand, and that he was likely going to be next.