Originally a 2015 April Fools' joke, fans loved the idea so much, it became a reality. A cross-over of the Ring and the Ju-On series, Sadako vs. Kayako pits the evil entities of both films against one another as they attempt to see who will be the last cursed individual standing. No, the pair don't just up and decide this on their own, it happens because someone who watches the cursed videotape learns the only way to beat the curse is to put another vengeful spirit up against Sadako.
Watch Sadako vs. Kayako on Shudder.