 As of May 2004, screenwriter John Sayles was writing the script, after being hired to finish earlier work done by Monahan, who had left the project to work on "Kingdom of Heaven".Sayles wrote two drafts for the film.In his first draft, Isla Nublar and InGen have been taken over by Grendel Corporation, a Swiss holdings company, while creatures from the island have begun attacking people on the mainland of Central and North America.