a.k.a. Indiana Jones IV
a.k.a. Indiana Jones and the Monkey King
a.k.a. Indiana Jones and the Garden of Life
by Chris Columbus
From what I can gather, this script was actually written by established screenwriter Chris Columbus. He wrote it unsolicited and presented it to the Lucas camp after the success of Temple of Doom. It wasn’t produced, as Jeffrey Boam’s Last Crusade script was used instead.Years later, the Monkey King script showed up online, with changes to the title and date made to fool the fan community that this may be a script for the fourth movie. Don’t believe it.
Edited to add:
According to an article at Mental Floss, Columbus did not write the script unsolicited, but was hired by Lucas (definitely more likely). Read a review of the script here.