So, here's the idea I had. It's random, yes. But here it is. The 3 golden goddess of Hyrule want to break the cycle of evil plaguing Hyrule, after watching Calamity Ganon thoroughly wreck Hyrule as he does in BOTW. After all, Link/Zelda have never truly killed him for good. He always comes back. So Nayru finds a book about the Slayer, and the goddesses then summon him.
A man, forged in the fires of the depths of hell, was flung away to another realm as he fought to stop another invasion. He arrives once more in a new world, but this time filled with fantasy and magic… and now he tries to prevent a sickening parody of what once was.