On March 12, the London premiere of Mulan had just wrapped when the film’s director Niki Caro received the call everyone was anticipating. Executives in Los Angeles had made the decision to pull the Disney tentpole and were about to make the announcement, scuttling plans for a European junket that was had just kicked off. The move didn’t come as a surprise. After all, less than a day before, President Donald Trump announced a new ban on most travel from Europe, aimed at stopping the spread of the coronavirus. That travel ban torpedoed any plans to promote the $200 million...