I understand what you are saying and I never rode the original haunted house however I do think something will be done to duel at some point. Whether it's returning it to the haunted house (I agree it's unlikely but cool to speculate about or something else). I think the park must know that something needs to be done to it and you have to remember that Merlin is made up of people some of which will care and do care about the rides themselves. I wouldn't be surprised if the creatives have tried to do something to Duel but have been told no by the board. Merlin has changed hands recently and it has gone private. We don't yet fully know what there approach will be however it looks more promising than later PLC Merlin did. I hope it signals a shift to ambition and long term planning and investment like the earlier Tussauds as we know it works because you can just look at the attendance numbers over the years and see what the public prefered. Alton Towers need to sort out its selection of rides for the whole family and that means making sure there haunted house is the best it can be.