Costner's Costly 'Horizon' Bites Box Office Dust The New York TimesKevin Costner's Horizon: An American Saga: Some historical inaccuracies in the Apache storylines. SlateHorizon: Kevin Costner's Blue Cowboy Hat, More Costumes IndieWireKevin Costner talks Native American representation in 'Horizon: An American Saga — Chapter 1' Entertainment Weekly NewsKevin Costner's 'Horizon' Fades At $4.1 Million Debut Forbes