Kevin Costner is embarking on an ambitious new project with the western 'Horizon: An American Saga, Chapter 1,' marking his first directing endeavor in over 20 years. Meanwhile, his high-profile exit from the hit TV series 'Yellowstone' has been a topic of much discussion and speculation. Costner grew visibly annoyed during an interview on CBS Mornings when persistently questioned about his departure, emphasizing that scheduling conflicts and unmet deadlines were factors. Despite the tensions, Costner expressed a willingness to return to 'Yellowstone' if the story aligns with his vision. The rest of the 'Yellowstone' cast has already returned to set to film the final episodes of the series.