Kevin Costner's new movie 'Horizon: An American Saga' is set to have a final runtime of 3 hours and 1 minute, with Part 1 releasing on June 28. Costner, the star of 'Horizon,' discusses his commitment to projects he likes. Chapter 3 of the film will start filming before the release of Chapters 1 and 2. Costner's upcoming epic Western film 'Horizon' is seen as a positive development for fans disappointed by his exit from 'Yellowstone.' Cole Hauser hints at a possible spinoff after the completion of 'Yellowstone.' Costner reveals insights on 'Yellowstone' scheduling issues and criticizes the management by Paramount and 101 Studios.