I noticed someone bring up Merlin Studios, what you need to remember is, Lionsgste would of had a much bigger say in how the ride looked than Merlin.
It would of gone something like this....
1. Thorpe Park gives an idea to Merlin Studios,
2. Merlin Studios works on the idea and brings out concept art, storylines etc etc,
3. Merlin Studios passes on ideas and concepts on to Lionsgate.
4. Lionsgate review the ideas and say either:
Yes - But this is what we want to add/remove.
No - This is what we want for you to get the IP contract.
5. Merlin studios and Lionsgate start a tug of war of ideas until both come to an understanding.
Lionsgate will get the final word as it's their brand Thorpe would be taking advantage of.