There's a theory from Big Bang Theory that Indiana Jones is actually irrelevant to the story, and that he wasn't really needed. Did any interview with George Lucas or Steven Spielberg ever cover this?
Links on plothole:
https://www.youtube.com/watch?v=kWE6M-rhh2U
http://www.dorkly.com/post/70633/indiana-jones-and-the-avoiders-of-the-lost-ark