The Dark Universe trailer made me think they might be using some psychological effects, like Alien Encounter. Specifically the clip of Dracula transforming into a bat and flying THROUGH the ride vehicle, and their mention of "using every trick in the book to create a visceral experience, so much that we needed to create NEW technology" to paraphrase. I don't think we really need visible gore in this ride, having lifelike full-size monsters inches from your face like Forbidden Journey, but leaning even harder into horror will be more than scary enough.