The REAL Reason Kevin Costner Could LEAVE Yellowstone.. If you're a fan of Yellowstone, you may have heard recent rumors about Kevin Costner potentially leaving the show. However, after initial reports of him asking for all six new episodes to be shot in a week, Paramount Network shut down the rumors and confirmed Costner's continued involvement. Fans can expect the second half of season five by the end of summer 2023, as well as more spin-off series set in the Yellowstone universe, including 1883 and 1923. While Costner's return for future seasons is not guaranteed due to his upcoming movie projects, the show's creators have plans for at least two more seasons. The fate of John Dutton and the future of the Yellowstone series still hold many surprises for fans to eagerly anticipate.