Going back to this, I believe many have shared this sentiment (and based on what we've heard, hopefully it will go this route): The attraction should be genuinely intense. Take the Dementor scene from Forbidden Journey, make it even grander and with the classic monsters, and even push it a little. Imagine pitch darkness, you hear a snarl or hideous laugh, and BAM suddenly you see a Dracula animatronic swooping towards your vehicle.
Also I'm curious how the beginning of the ride will go. We know from Screamscape it likely begins with the Monster's resurrection, but then things quickly go sour (or possibly according to Victoria's plan?), but how do things go sour? Does the power from the resurrection blow a hole in the wall and we tumble into the caverns/dungeons that hold the Monsters? It's so exciting to think about!