If you aren’t much of a superhero movie fan (or even if you are), the upcoming slate of movies Marvel alone is trying to push out may seem rather exhausting. 10 more films in the next three years with plans through 2027? It’s no wonder you have people like Spielberg predicting superhero films will go the way of the Western and burn out in the near future.

Yet, despite all the films churned out by Marvel and DC, moviegoers keep purchasing tickets without any signs of stopping. Superhero stories are a (relatively) narrow genre—and yet many viewers (such as myself) regularly see two to four superhero films a year, despite the criticisms Marvel’s received for weak villains and paint-by-number three-act stories.

How has Marvel been able to keep selling tickets without running into genre fatigue? There are multiple reasons, but there’s one I’d like to focus on: Marvel keeps the genre feeling fresh by mixing it with other genres. This is a skill that not only budding novelists can be taking advantage of—but a skill some of the best fantasy authors today are using to craft unique and brilliant stories.