Executive producer Sidney Sheinberg made some suggestions to the Back To The Future script. He changed Marty's mother's name from Meg to Lorraine, which was his wife’s name. He also came up with Doc Brown’s name and replaced his pet chimpanzee with a dog.
Sheinberg also wanted the title changed to Spaceman from Pluto, because he was convinced no successful film ever had "future" in the title.
He suggested Marty introduce himself as "Darth Vader from the planet Pluto" while dressed as an alien forcing his dad to ask out his mom rather than "the planet Vulcan", and that the farmer's son's comic book be titled Spaceman from Pluto rather than Space Zombies from Pluto.
Appalled by the new title that Sheinberg wanted to impose, Zemeckis asked Spielberg for help. Spielberg subsequently dictated a memo back to Sheinberg, wherein Spielberg convinced him they thought his title was just a joke, thus embarrassing him into dropping the idea.