The Dungeon is going in just above Sky Coaster in the building they used for Forbannelsen a few years ago. The kids Bumper Cars are going into Nightmare.Also, "The Dungeon" appears to repurpose the building that used to house Nightmare, the 4D theatre shooter ride. It was never *that* popular with guests and seen as a one-and-done ride. Funnily enough, the park used to have a haunted house attraction in the same building before Nightmare was built. I guess they are reverting to the roots with this one, in an even cheaper fashion.
I seem to recall that they planned to relocate the Bumper Cars to the Nightmare castle, though, and refurbish the facade to look like an old-timey fire station. I guess there was no room for that in the budget after all?