I decided to update my backlog of animations so recently I watched Frozen and Big Hero 6, thus the idea of this crossover.
I'm surprised there isn't a quest like that in Witcher 3.. I guess there are no freeze map there so they couldn't do it right, but it has all elements of a Witcher contract.
p.s. The "bad guy" in Frozen was so inept near the end if he had tripped and fall into a sword killing himself it would be better than what he did in the end.
However, outside this, he did a pretty good job of ruling the kingdom given all the circustances. The guy was a good actor and a good politician and the way he threw it all in the end was super forced.