'F1' is Apple's first box office hit. Its director shared an idea for a crossover sequel featuring Tom Cruise

Brad Pitt and Tom Cruise at the "F1" European premiere. Ian West / PA Images via Getty Images "F1" is Apple's biggest box office hit since it started producing original films. The director, Joseph Kosinski, said the film would only have a sequel if audiences liked the first movie. Kosinski told GQ…