This is incidental.
I've never been persuaded by the argument that Islands is somehow based on "literature".
It's based on popular IPs in general; it just happens that most IPs appear as written material first, mostly because movie studios value caution over originality and would prefer to adapt a successful novel or comic book rather than produce something brand new out of whole cloth. Walt Disney himself had the same mindset.
Look at the Islands of Adventure interpretation of Jurassic Park for a moment; it's clearly based off the film, not the novel. All the architecture, logos, individual dinosaur designs, the paint schemes of the vehicles, music, etc. etc. etc. are taken directly from the film, not the novel, and in any situation where the novel is in conflict with the film the film trumps it. For starters, why is John Hammond still alive and giving the preshow narration? If they were basing the attraction off the the novel, Hammond is Procompsognathus chow.
What about Dudley-Do-Right? He's always been a television character.
If this were indeed a literature park rather than an IP (movies included) park, you would have had Michael Crichton, not Steven Spielberg dedicating the ride when the opened it.
