TMDb/Horizon: An American Saga TV Kevin Costner's Western epic flops: $100M budget, $38.8M box office, harsh reviews, and a quick pivot to streaming. May 5, 2026 AceShowbiz - Horizon: An American Saga was envisioned as a sweeping four-film Western epic co-written, directed, and starring Kevin Costner. The saga was intended to chronicle the expansion of the American West surrounding the Civil War era over a 15-year span, beginning with its first chapter released in 2024.