User blog comment:Dr Bunnyman/Allowed or Not?/@comment-24501610-20140422211243

Considering that there are plenty of Creepypasta that are based on things like board games, video games, TV shows, and so forth, that a Creepypasta based on a movie would probably be fine. So long as said Creepypasta is only based on an existing work and isn't a direct copy of it.

Heck, one of my Creepypastas, A Bright Flash, is told from the perspective of Godzilla shortly after his mutation. It takes place within the  Tohoverse (IE: The world in which the Toho Studios films take place), but isn't a direct adapation of any film in particular.

Still, I would advise to be careful when using copyrighted characters. So long as you don't try to profit off of someone else's intellectual property, you should be fine. But, some people/companies don't like to see their characters portrayed in a certain way (And, trust me, that's a whole can of worms you do NOT want to open), which could lead to them requesting/demanding that you remove your story (or stories) from the web.