Jon Snow died betrayed by his sworn brothers. When Melisandre resurrected him somebody else came for the ride. The Long Night was coming and Westeros needs a King. And so rises Daeron III of House Targaryen, the Song of Ice and Fire. You can find this story in FF and AO3 under the name of The Promised Prince. You can find more chapters in my pa.tre.on page: https://www.patreon.com/Dragonspectre