JP2 No reason to limit JP2 to Crichton's novel as it exists OTL. The book was written with a film sequel in mind so whatever Spielberg wants Spielberg gets. Have Spielberg ask James Cameron to direct JP2 as a darker and more violent film - Hard PG-13 or R. Since JP (the book and film) made it very obvious that dinosaurs had been escaping to the mainland, set the entire story in the jungles and villages of Costa Rica, where local people (and tasty tourists) are being attacked by what the scientists believe must be isolated compys, raptors, and pterodactyls. A team of Ingen scientistss and "Asset Control" mercs (including one or two of the original cast) are sent to investigate and capture or kill what is thought to be only a few isolated escapees (who can't breed). But of course "nature found a way" and they discover breeding populations, including a huge nest colony of raptors who are breeding, claiming territories, killing livestock and people, and spreading like mad. Just for grins, a few biggies (T-Rex, Triceratops, etc) have also somehow gotten to the mainland as well, leading our heroes to suspect some of these may have been engineered by an even less scrupulous unknown Ingen competitior. Move ends with a massive dino hunt and battle a la Aliens, with the compys poisoned, the biggies captured, and raptor nest finally napalmed and supposedly the problem is solved.
JP3 But of course it isn't. Although the dino escapees from JP2 are all killed or captured, rumors persist that other, far-less scrupulous evil-doers have obtained embryos and the technology. They doing what Hoskins wants in JW...engineer hybrid dinos...but for purposes of terrorism not "normal" military purposes. But once again (halfway through the movie) "nature finds that way again" and the hybrids (several variety of intelligent dinos bred with mammalian and even human DNA intermixed kill the baddies and escape to terrorize and eat people. In a principally military/covert ops operation (probably in NW Pakistan or someplace similar) an international (NATO) team of combat operatives including a few geneticists and animal behavioral experts are sent in to investigate and eliminate the monsters. After a fair amount of claws, teeth, booms, and bangs happen, the people discover that the super-raptors who seem to be in charge have an almost human-level of intelligence and communication with them is possible. Peace is negotiated and the earth now has two sentient terrestrial species. Film ends on a hopeful note.
Oh yes. Put feathers on dinos as much as possible in both movies.