Board Thread:Lore Discussion/@comment-24986094-20140526090540/@comment-24986094-20140526190048

Say all dragons are of Akatosh, for the sake of argument. If a dragon (or group thereof) other than Alduin created dragonborn to stop this first dragon, then Akatosh did indeed send such a champion. This can tie into your "Broken Windows" theory (assuming I read and understand it correctly) in that dragons are collectively just another manifestation of Akatosh, or even avatars of a sense.