Board Thread:General Discussion/@comment-11388043-20130711070950/@comment-77.172.125.107-20130831153750

If Alduin returns 'beyond time' and a dragonborn is gifted by Akatosh who IS time, then Alduin will return when Akatosh is gone, and no dragonborn can be appointed to stop him. But that wouldn't really matter, because 'beyond time' is most likely beyond man and mer too, so there is no-one left to care.