In June 2002, director Steven Spielberg told Starlog
magazine that he planned to produce Jurassic Park IV, and director
Joe Johnston, who helmed Jurassic Park III,
would direct it. In November 2002, screenwriter William Monahan was hired
to write, with the film's release slated for summer 2005. In July 2003,
Monahan completed the first draft, with the story no longer set in the
jungle. Actor Sam Neill said he was returning as Dr. Alan Grant, with
filming expected to begin in 2004 in California and Hawaii. In September
2004, screenwriter John Sayles was re-writing the script, with the film
re-slated for a winter 2005 release. His second draft focused on the new
character Nick Harris, who returns to Isla Nublar, the location of the
first film, and retrieves Dennis Nedry's can of DNA. He is captured by the
Grendel Corporation, which now owns InGen, and he is hired to train five
genetically modified Deinonychus as mercenaries.
In October 2004, palaeontologist Jack Horner said he
would return as technical adviser for the fourth film as he had done for
previous Jurassic Park films. By April
2005, special effects artist Stan Winston explained that the delay in
production was due to repeated revisions of the film's script, none of
which satisfied Spielberg. According to Winston, "He felt neither of [the
drafts] balanced the science and adventure elements effectively. It's a
tough compromise to reach, as too much science will make the movie too
talky, but too much adventure will make it seem hollow." In February 2006,
producer Frank Marshall said filming would begin in 2007 for a 2008
release. In March 2007, Sam Neill said he was not asked to reprise his
role as Dr. Alan Grant, while Laura Dern was asked to return for the new
film, which Universal still wanted to release by 2008. Director Joe
Johnston was also reported not to be directing the film. Richard
Attenborough has been contacted about reprising the role of John Hammond.
The film was delayed to 2009, because of the 2007 Writers Guild of America
strike.