Paul Mescal will get “profoundly depressed” if ‘Gladiator 2’ propels him to megastardom. The 27-year-old actor has the lead in Sir Ridley Scott’s upcoming blockbuster sequel and while he’s hopeful it won’t change his life too much, he is concerned about how it will impact his ability to go about his daily life unbothered. Asked if he is prepared to become one of the most famous men on the planet with the film, as happened to Russell Crowe when the original movie was released, he told Sunday Times Culture magazine: “I don’t know what the difference will be. Maybe that’s naive? Is it just that m…