I sound like a broken record already, but another tracked dark ride at Towers would be a good thing IMO, maybe make NST into an interactive dark ride shooter in which you could easily reuse old scenery such as the elevator in which much like in the old attraction you are going underground but here you are sent down to shoot and kill all of the hatched Nemesis babies to prevent them reaching the surface. Not a bad idea the more you think about it.
The building would need to be twice as large though knowing Merlin, just plonk some shipping containers on the side, put a roof over it and there you go. If this happened then you might see Duel lose the shooters in which this new version of NST ends up doing its role which honestly might shoot it much better.
Plus with the tracked dark rides (not including Hex ofc), I like the idea each fits an age group in which GG is for younger audiences, Duel for a family audience and with this hyperbolic version of NST, more for an adult crowd just to make it far more intense with perhaps putting leg pokers and such in the ride vehicle to add to the interactive factor...now that I think about it, it is something of a something new, something borrowed and something old about it.
Alas, that's never going to happen though certainly would have potential if done in right hands, that being not Merlin though I'd honestly eat my hat if something quite special goes in there.