The SAW reference is interesting
@Matt N and is a great case study of how a not very interesting ride can do wonders for a park for a lengthy period.
I still think this is a misrepresentation of the popularity and health of the Jumanji franchise. The last Jumanji film came out less than two years ago and did as much at the box office as all the SAW films put together.
I think the real value of an IP is not just about what it brings to the ride itself, it's about their ability to maximise on their investment by instantly creating an awareness of what something is. In a lot of cases you are able to get someone's buy in (quite literally) just by the mere mention of the brand.
"Chessington have a new Gruffalo ride"
vs.
"Chessington have a new ride, it's about a mouse taking a journey through a forest and meets various other animals and then meets this big monster"