Jurassic Park III dinosaur-bird connection, said the feathers quills added to the "Velociraptor" for "Jurassic Park III" "looked like a roadrunner's toupee", but conceded that feathers are difficult subjects for computer animation and speculated that "Jurassic Park IV"'s raptors would have more realistic with plumage. In 2002, Crichton said he had not watched the film. A teaser trailer was released online in September 2000. Universal avoided excessive early marketing to prevent a possible backlash; the studio believed awareness of the film was already sufficient. Marketing began in April 2001, three months before the film's release. The first footage from the film was aired
Jurassic Park III filming schedule was expected to begin by August that year, with a projected release in July 2001. Macy originally turned down his role due to scheduling conflicts. Trevor Morgan and Téa Leoni were cast in August 2000. Utah's Dinosaur National Monument and a military base at Oahu were being considered as filming locations. During the pre-production phase, concept artists created advertising for the film using a working titles including "Jurassic Park: Extinction" and "Jurassic Park: Breakout". Five weeks before filming began, Johnston and Spielberg rejected the entire script because they were dissatisfied with it; $18 million had already been spent