Indiana Jones and the Supernatural Spookies?

Steven Spielberg told Sci Fi Wire that "Indiana Jones 4" will have a supernatural element and that it will take place in the 1950s. "You have to understand that [star] Harrison [Ford] is going to be 62 years old when the film [begins production in 2004], so we had to push the years into the 1950s". "The story’s wonderful, but Frank’s writing the script right now. Frank and I and George spent weeks together pounding out the story."