Lucas set the film in an earlier year than the first to avoid repeating the use of Nazis as the villains. Spielberg originally wanted to bring Marion Ravenwood back, with Abner Ravenwood considered as a possible character. In developing the story, Lucas conceived of an opening chase scene with Indiana Jones on a motorcycle on the Great Wall of China, followed by the discovery of a ""Lost World" pastiche with a hidden valley inhabited by dinosaurs". Another idea was to feature the Monkey King as the plot device. However, Chinese authorities refused permission for them to film in the country, requiring a different setting. Lucas wrote a film treatment that included a haunted castle in Scotland, but Spielberg felt it was too similar to "Poltergeist"; so the setting transformed into a demonic temple in India.