Could a new "Yellowstone" prequel, set in 1969, be on the horizon? The season finale of "1923" hinted at Spencer Dutton's fate, sparking rumors of a series exploring his later years as the family patriarch. This era of cultural upheaval and rodeo glory promises a fresh look at the Duttons. Will Kurt Russell or Brandon Sklenar take on the role of older Spencer? Watch the video for the full casting scoop and timeline breakdown!