Horror loves crossovers, especially when a given franchise (or two) is running out of gas. When the genre's various boogeymen run out of normal victims to eviscerate, the next logical step is to pit them against each other. Superheroes used the same trick in the comics from time immemorial, and the principle remains the same. The roots in horror movies go back to the Universal Monster days, and have included a number of memorable (if not always brilliant) match-ups.
Source：https://www.cbr.com/freddy-vs-jason-best-horror-crossover/
