It be interesting what they do with it, fact is if you wanted to do the minimum, you could change the pre and post show film, film a person in front of a green screen for the carriage screen with Derren and replace his voice, either like for like or for a new story
Oh and remove any Derren Easter eggs, like the Trick or Treat poster in the mid scene and apparently the VR had some Easter eggs but thay may of been part of VR 2 which was changed (bonus props to the alternative version of VR 2 which was never used where the demon had a different design and flew, like how the first section had 2 versions)
But with MMM it sounds like they be doing more than that especially if they are removing the troublesome hot VR (the vr wasn't the only reason the building is very toasty but it doesn't help)
I would expect screens in the windows of the train mainly as the alternative is trying to do all media via the small advertising screens
and use the leg ticklers that where thought about, installed and then cut I want to say cause they didn't work properly?
A actor lead experience could work, especially since it already was kinda one, just the actor going from load to load not just the middle scene
I would love to see them re do the lights on stick train crash effect but its a shame that it the effect was temperamental and didn't work consistently since it was probably a highlight of the ride
I would also hope they keep the atmosphere, by that, the ride has a gloomy tense atmosphere with its theming music and a good (usualy actor lead) spiel between the pre show and load works very well (this was one of the actor positions that was a proper actor if I remember correct, not ride staff doing a bit)
There is potential here to make a proper Tussauds walk through experiance
Dungeons, Hex, etc
I hope they get it right and reliable