Horror has a lot of subgenres, from slashers to monster movies and everything in between, and supernatural and possession films have been among the most popular for many decades. Classics like Rosemary's Baby and The Exorcist did it best, and more modern offerings like the Conjuring franchise have kept it going, but as good as the subgenre has been, it can also fall into some of the laziest tropes. If you're a horror aficionado, a supernatural movie filled with moves you see coming because it's been done many times before is frustrating. Sadly, such is the case with Rosario.