I dig it. If i could mod, i would make my own backstory into a bit of a questline. Put a book or two that makes random mention of Queen Alissa's possible bloodline with a mortal champion when she was companioned with Kyne's demi god son (since demi gods couldn't have children). Have those books mention some sort of shrine or cave holding proof of this blood line. Once you find the cave/place, by using the obscure references in the books, you could receive another book and some artifact, then the group that has been hunting my bloodline for eons would appear and attack you, then triggering random attacks during your skyrim travels (much like random bandit attacks, or similar to the assassins coming after you).You have a pretty neat idea, now go learn to mod