Kevin Costner's latest film, 'Horizon: An American Saga - Chapter 1,' serves as the beginning of a grand epic aiming to depict the settling of the American frontier during the Civil War from diverse perspectives. With Costner heavily involved in directing, producing, and acting, the movie carries a hefty budget and personal investment. Despite its visually stunning portrayal of the Old West and star-studded cast, the film faces criticism for its lengthy runtime, multiple plotlines that feel disjointed, and mixed reviews from critics. 'Horizon' marks a significant project for Costner, reflecting his decades-long dedication to storytelling and the Western genre.