Quick, nerdy, question. Is the facility in Jurassic Park 3 supposed to be the same one from Jurassic Park 2? In the third film, before the group enters, Sam Neill passes a broken-down vehicle that has its window pecked out, which vaguely recalls the velociraptor attack from the previous film.
I think the need for the second island was mostly from the books, I think they mentioned the first island being napalmed to stop the spread of the animals, but it's been over a decade since I read them. It also paints Isa Nublar as a COMPLETE lie, as they weren't even really creating the Dinos there.