[8] It was revealed in 2022 that Spielberg's initial idea for Jurassic Park IV involved an intelligent dinosaur-human hybrid which escapes from a laboratory and rampages through a city, further exploring the concept of genetic manipulation and its effects.
Winston intended for the special effects to be more advanced than in the previous films, for instance by creating animatronics of Velociraptors with internal motors, providing better control and movement.
[36] He was also asked about a hypothetical idea of humans evolving from dinosaurs rather than mammals; Horner responded, "Keep thinking about that, and in a couple of years go see Jurassic Park 4".
The script featured a brief return to Isla Nublar and focused on a mercenary named Nick Harris, a new character sent by Hammond to the island to retrieve a canister of dinosaur DNA that was lost during the events of the first film.
[46] By June 2004, Frank Marshall had joined the project as a producer,[47] while Alex Proyas was in discussions to direct, with filming expected to begin in nine months for a late-2005 release.
[52] In August 2004, Drew McWeeny of Ain't It Cool News published a review of Sayles's initial draft, calling it "well-written and inventive" but "bugfuck crazy".
[77] In a 2008 interview, published a year later, Johnston discussed the possibility of Jurassic Park IV, saying that its story was completely different from its predecessors and would not be set on an island.
[99] Brad Bird wanted to direct Star Wars: The Force Awakens, and he suggested to Kennedy that she temporarily employ Colin Trevorrow as a stand-in for him during the film's pre-production.
[110][111][112] Despite Trevorrow's lack of experience on such a large film project, Crowley said "from the beginning he exhibited real characteristics of leadership and had that inherent decisiveness required.
[101] After reading Jaffa and Silver's draft, Trevorrow insisted on completely rewriting the script with writing partner Derek Connolly, who had never seen any of the Jurassic Park films prior to that point.
[113] Another reason for the delay was to allow time for the construction of practical sets for the film's fictional theme park; it was previously intended to add in these buildings using computer effects.
[110] Jaffa and Silver's draft, titled Jurassic Park IV,[103][114] included an early scene set in China,[98] where the fossilized remains of a new dinosaur species are discovered by a Chinese paleontologist.
[136] The script also included an opening scene with the dinosaur handler and his raptor pack jumping out of a helicopter to perform a military raid of a drug dealer's compound,[137] an idea that was present in Sayles' earlier draft.
[142][143] Trevorrow said this was inspired by a quotation from Ian Malcolm in the first film: "You stood on the shoulders of geniuses to accomplish something as fast as you could, and before you even knew what you had, you patented it, and packaged it, and slapped it on a plastic lunchbox, and now you wanna sell it".
[113] Trevorrow and Connolly did not want to include previous characters in the new film without a good reason for their return; they considered Dr. Henry Wu, the scientist responsible for recreating dinosaurs, a logical choice.
[113][118] Trevorrow said that the characters Alan Grant, Ian Malcolm, and Ellie Sattler were not included in the script because "I respect those actors too much to shoehorn them into this story for my own sentimental reasons.
[113] In addition to the Indominus rex, the earlier draft by Trevorrow and Connolly also included a second hybrid dinosaur named Stegoceratops, which is bred using DNA from Stegosaurus and Triceratops.
[164] One scene, which was inspired by Crichton's novel The Lost World, involves Owen riding a motorcycle while his raptors race alongside him during their search for the Indominus.
[167] Trevorrow suggested the idea of including a Mosasaurus as part of a theme-park feeding show in which park-goers would watch from bleachers as the animal leaps out of a lagoon and catches its prey: a shark hanging above the water.
[186] Trevorrow also said he cast actors such as Sy because they were well-known internationally, stating that "this is a global film and Jurassic Park doesn't belong to just America".
This was chosen because it allowed enough height for humans and dinosaurs to fit into the same frame without giving up a sense of scope, and closely matches the ratio of digital IMAX screens.
[5] Scroggins Aviation was hired to fabricate and build the blue Eurocopter EC130 T2 airframe body known as "JW001" in the film,[199] while 32TEN Studios created the park's automatic Jurassic World gates and various practical effects such as explosions.
[113] The 40-foot (12 m)-high Indominus paddock and the Gyrosphere departure platform were built at Oʻahu's Kualoa Ranch; both sets were left standing after production to become tourist attractions.
Trevorrow said about the scene: "I wanted to be able to step back and look at these tableaus of chaotic action and allow people who watch the movie over and over again ... to always see a different story as you look specifically at different parts of the frame".
[213] The pterosaur sequence includes a scene in which Claire's assistant Zara (McGrath) is carried off by several Pteranodon before falling into the park's lagoon, where she is eaten by the Mosasaurus,[214][215][216][217] marking the first female death in the series.
[194][168][101] Interior scenes, including the Jurassic World visitor's center, control room and laboratories, were filmed at the Michoud facility,[113] where six stages were occupied for the production.
[220] Approximately 200 extras, acting as park guests sitting on bleachers, were doused with water as part of a scene depicting the Mosasaurus feeding show,[113] which was filmed on an outdoor set at the Michoud facility.
[221] The raptor enclosure, an octagonal, 20 ft (6.1 m)-high outdoor structure, was also constructed at the Michoud facility,[194][220] as was a set for the original Jurassic Park visitor center.
[152][194] An overturned Ford Explorer tour vehicle from the first film was initially considered for inclusion in Jurassic World, before Trevorrow settled on featuring the original park's visitor center.
[233][234] Visual effects supervisor Phil Tippett and Industrial Light & Magic (ILM) also returned to create dinosaurs using computer-generated imagery (CGI).