Forty years ago the big holiday hit was Superman, Hollywood’s very first superhero blockbuster. Warner Bros marketed the movie by promising the sky to moviegoers: “You’ll believe a man can fly.” Now, four decades later, that promise should be rewritten to reflect a new era of superhero blockbusters: “You better believe a woman can fly, too.” Deadline broke the news this week that Sony is ramping up a Spider-Women film that will feature three female iterations of Marvel’s wall-crawling Spider-Man and a script by Bek Smith. The project joins a growing wave of female superhero projects in the works that...