I discovered a small interesting anecdote, while i was browsing around another website. I don’t know if the story really happened that way, so take it with a grain of salt:
[…] Years ago, when I was up North at the Lucas Ranch, getting approval on a bunch of toy sculpture prototypes, I was invited to a party that night. I was staying the night anyway and flying back the next day, so I went… At this party, I met some of the designers and concept artists that worked on the prequels. One of them (who shall remain nameless), whom I’d met before actually, told me that Spielberg had come up to visit George while they were in pre-production on Episode 1. He continued to say that while there, he overheard a conversation between Lucas and Spielberg in which Lucas was trying to convince Spielberg to re-do all of the shark sequences in “Jaws” with a CG shark, then re-release the film…[…]