 Lucas made the film a prequel as he did not want the Nazis to be the villains once more . Spielberg originally wanted to bring Marion Ravenwood back , with Abner Ravenwood being considered as a possible character . Lucas created an opening chase scene that had Indiana Jones on a motorcycle on the Great Wall of China . In addition , Indiana discovered a " Lost World pastiche with a hidden valley inhabited by dinosaurs " . Chinese authorities refused to allow filming , and Lucas considered the Monkey King as the plot device . Lucas wrote a film treatment that included a haunted castle in Scotland , but Spielberg felt it was too similar to Poltergeist . The haunted castle in Scotland slowly transformed into a demonic temple in India . 
