With starring roles in action tentpoles like "Insurgent" and the newly rebooted "Terminator" franchise, the brawny 28-year-old Australian Jai Courtney—who’s appeared alongside Tom Cruise in "Jack Reacher" and Bruce Willis in "A Good Day to Die Hard"—seems poised to become the go-to blockbuster bruiser of his generation. Shirt, price upon request, YOHJI YAMAMOTO.