Costner’s big-budget Western, Horizon: An American Saga, is facing tough box office prospects with tracking indicating a domestic opening of $12 million, far below the $100 million production cost. Despite Warner Bros. handling domestic distribution, a major marketing push is needed to attract Costner's fan base, mainly in the middle of the country. The film, a passion project for Costner who invested $38 million of his own money, relies heavily on foreign sales for funding. In contrast, Paramount’s A Quiet Place: Day One is expected to dominate the box office with a projected $40 million opening. Despite the challenges, Costner remains determined, already filming Chapter 3 of the Horizon saga. With box office tracking being unreliable of late, the outcome of these summer releases remains uncertain.