Italy’s Leone Film Group — which is in Cannes as a producer of James Grey’s competition entry “Paper Tiger” — is set to make an ambitious origins movie about Sergio Leone ’s quest to shoot “Once Upon a Time in America,” the gangster epic that premiered at Cannes in 1984 and is now considered a masterpiece. “It’s basically the story of a man who chases a dream for his entire life,” Raffaella Leone, who is Sergio Leone’s daughter, told Variety . “Or, at least, who took 15 years to make a movie and didn’t do anything else until he managed to make it. And it’s told with my father’s irony.” Italian directorial duo Giuseppe Stasi and Giancarlo Fontana — who broke out Prime Video’s dark and comic crime series “The Bad Guy” — are set to helm the yet-to-be-titled “Once Upon a Time in America” origins picture that they are writing with “The Bad Guy” scribe Ludovica Rampoldi. Popular on Variety The film will criss-cross through different time periods, including flashbacks to Sergio Leone’s childhood.…