In 2000, Spielberg's son asked when the next "Indiana Jones" film would be released, which made him interested in reviving the project. The same year, Ford, Lucas, Spielberg, Frank Marshall, and Kathleen Kennedy met during the American Film Institute's tribute to Ford, and decided they wanted to enjoy the experience of making an Indiana Jones film again. Spielberg also found returning to the series a respite from his many dark films during this period. Spielberg and Lucas discussed the central idea of a B-movie involving aliens, and Lucas suggested using crystal skulls to ground the idea. Lucas found these artifacts as fascinating as the Ark, and had intended to feature them for a "Young Indiana Jones" episode before the show's cancellation. M. Night Shyamalan was hired to write for an intended 2002 shoot, but he was overwhelmed by the task, and claimed it was difficult to get Ford, Spielberg, and Lucas to focus. Stephen Gaghan and Tom Stoppard were also approached.