I'm not against a good IP. But it needs to be a good one. If this was a temporary attraction for the next 3 years, it'd be spot on to coincide with a new film realease. But it's not, it's a permanent area with the IP firmly baked in.
Jumanji was massive in the 90's, starred the late (and great) Robin Williams and is repeated quite a bit on telly, yet some of the youngsters above hadn't even heard of it. So what chance will this have of being relevent to a young 'un in 6 or 7 years time? I've watched the Reboot and it's sequel, they're successful and popular but come on, this ain't no Marvel, DC or Star Wars. Look at Saw, Walking Dead etc, massive at the time (Saw films are still coming out aren't they?) but Merlin joined the party too late, probably for a discount price.
Putting an IP into a theme park area means it has to weather the sands of time. If it's a themed area, they should be getting a good 15 years out of it. Cbeebies, Julia Donaldson, David Walliams, Lego - whatever we think of the attactions, areas and parks that bear the name - are all good examples of ones that will. I bet you they'll be posts on here about how irrelevant this IP is before the decade is out. An original IP would stand a much better chance.