None of them.
Alton Towers won't go anywhere near a ride company associated with any sort of recent bad press for the next few years.
I'd love Blackpool to get Big Dipper or Grand National RMCed, but given it's taken them as long as it has to be able to afford this Mack Launched coaster (the biggest investment since Valhalla I think) I' be very surprised to see another big investment so soon.
Thorpe Park have a recent history of well-marketed, gimmicky creds since Stealth so a looping woodie sounds great on paper, but the Alton Towers connection that's already been mentioned puts paid to that notion, at least in the short term.
Flamingoland will get new creds and could get an RMC, but they don't go for big blockbuster rides or companies such as B&M, Intamin or the like. It would take a massive change in their development strategy for an RMC of any sort to happen.
As for the others, Chessington is a non-starter because Thorpe is down the road, Lightwater Valley are permanently skint, Drayton just don't get amazing creds, and Oakwood...ha. And I purposely haven't mentioned Paultons until now because I'd love them to pull one out of the bag, but that ain't happening any time soon.
Merlin certainly won't touch any products they consider "tainted", especially with the amount of press coverage the Smiler accident received. You could argue that Six Flags have still continued with Intamin and RMC projects despite accidents with overweight/disabled people not being secured in properly and getting ejected. But I've never known any bad press quite like the Smiler accident. And because it's now the defacto answer when you think of "rollercoaster crash", Merlin flat out won't take any risks.
