Kevin Costner Balances 'Horizon' Debut and Potential 'Yellowstone' Return

Costner's new film 'Horizon' features his son in a minor role while he considers conditions for returning to 'Yellowstone.'

Kevin Costner cast his 15-year-old son, Hayes, in a small role in 'Horizon.'
Costner left 'Yellowstone' due to scheduling issues but hasn't ruled out a return.
He invested over $38 million of his own money into the 'Horizon' project.
Costner's divorce and legal battles have highlighted financial strains and commitments.
The first part of 'Horizon: An American Saga' premieres on June 28.