User blog comment:IceFireWarden0/Next Official Elder Scroll's Game Predictions/@comment-142.1.57.140-20121129183607/@comment-160529-20121130073954

from my understanding is that dragons as a whole were meant to walk the line between mortals and immortals, created by akatosh to balance the immortal forces (daedra) and mortal (beings of mundus)

Alduin I think was supposed to be a gifted individual, with great power to heal and mend those of his kind. It failed and he became a tyrant.

The dragons are a failed concept, that woudl be refined into the mortal heroes that walk the face of nirn. They just didnt work out, and that is probably why the dragonborn were created. . . to end the dragons

what happened to alduin when he was killed? if I had to guess akatosh probably claimed his spirit because he is pissed off at alduin for being a complete douchebag and failure.