Double-Crossed

I have a soft spot for crossover stories. Of course, a lot of this is because of the fan fiction series that I loved writing even if I cringe to actually read it, but the appeal goes farther than that. It even goes farther than the general concept of throwing beloved characters from a generally bright and sunshiny series into various death traps and other trauma.

Really, all writing is crossover writing. I don't mean we're all really fan fiction writers (although an argument could probably be made for that), but we're too far along in time for any work to be wholly its own thing. Brutal is a crossover between Hetalia and The Hunger Games; The Long and Winding Road is a crossover between Hetalia and the zombie apocalypse; the story of Max in prison is a crossover between Macbay Transportation Services and a writing prompt; Portalmancy is a crossover between the ideas of a more literal photogate and the power to telepathically switch door hinges.

Whether it be an entire pre-made universe (such as the real world, if not a published story), a system of magic, a character trait, or or a time period, everything in a story is from somewhere else. The only real creation is crossing things over, finding a complex combination that hasn't quite been laid out in words (or pictures, or maybe notes) before.

That's my take on it, at least. What do you think?