In October 1991, "Oliver & Company" director George Scribner was the initial director of the film, being later joined by Roger Allers, who was the lead story man on "Beauty and the Beast" (1991). Allers brought with him Brenda Chapman, who would become the head of story. Afterwards, several of the lead crew members, including Allers, Scribner, Hahn, Chapman, and production designer Chris Sanders, took a trip to Hell's Gate National Park in Kenya, in order to study and gain an appreciation of the environment for the film. After six months of story development work Scribner decided to leave the project, as he clashed with Allers and the producers on their decision to turn the film into a musical, as Scribner's intention was of making a documentary-like film more focused on natural aspects. Rob Minkoff replaced Scribner, and producer Don Hahn joined the production as Schumacher became only an executive producer due to Disney promoting him to Vice President of Development for Feature Animation. Hahn found the script unfocused and lacking a clear theme, and after establishing the main theme as "leaving childhood and facing up to the realities of the world", asked for a final retool. Allers, Minkoff, Chapman, and Hahn then rewrote the story across two weeks of meetings with directors Kirk Wise and Gary Trousdale, who had just finished "Beauty and the Beast". The script also had its title changed from "King of the Jungle" to "The Lion King", as the setting was not the jungle but the savannah. It was also decided to make Scar and Mufasa brothers since the writers felt that it was much more interesting if the threat came from someone within the family.