Kevin Costner's new film, 'Horizon: An American Saga,' has generated significant buzz at the Cannes Film Festival. Despite receiving mixed reviews, including being described as a 'clumsy slog' by some critics, the film earned an 11-minute standing ovation. Costner, who directed, co-wrote, and stars in the film, has invested $100 million of his own money into the project, with a $38 million bet on its success. The film is the first chapter in a planned four-part series, with subsequent chapters set to release on June 28 and August 16 this year. Costner has hinted at similarities between 'Horizon' and 'Yellowstone,' suggesting that elements from his film may have influenced the TV show. Costner's son, Hayes, also appears in the film, adding a personal touch to the project.