Lucasarts' seminal 1992 point-and-click adventure classic Indiana Jones and the Fate of Atlantis nearly received a sequel before being consigned to the grave.
As detailed by The International House of Mojo, Lucasarts was waist deep into production on a follow-up Indiana Jones adventure. Dubbed Indiana Jones and the Iron Phoenix, the game was to be set in 1947 as Indy races Nazis to find the Philosopher's Stone (before Harry Potter was created, mind) that could be used to resurrect Hitler. The full game would have featured Indy searching for three pieces of the Philosopher's Stone with a finale set in South America.
Originally this sequel was going to be headed by Joe Pinney, who later migrated to Telltale where he helmed Tales of Monkey Island, Sam & Max: The Devil's Playhouse and Jurassic Park: The Game. Later Lucasarts veteran Aric Wilmunder was put in charge with background artist Bill Stoneham.