Jon Snow's Crossover Adventures - Birthday Present

This was a late Birthday/Christmas present for my IRL friend Who wanted something with Jon Snow and the Disney. And Little Mermaid is by far her favourite. So at the end we got random crossover time. Had fun trying to (but not nessecarily succeeding) in trying to emulate more of the Disney style.

So one day Jon Snow wakes up to find out he's in the wrong series. Will he get back? Will he hook up with his new red-headed girlfriend instead? Will Jon have to fight an evil sea witch? How many characters will die before we reach the end? Or will Jon just learn to embrace life under the sea? Does this fanfiction actually exist somewhere? And if not. Why not?