“Mutation: it is the key to our evolution. It has enabled us to evolve from a single-celled organism into the dominant species on the planet.” Thus begins the very first X-Men movie from the year 2000. Nearly a quarter century later, the big-screen X-Men saga stands as one of the most important superhero franchises in history. Along with Sam Raimi’s Spider-Man, it was one of two massive comic-book-inspired hits that made Hollywood finally take notice of Marvel’s blockbuster potential. Those films were crucial in getting Marvel into the movie business itself, and in helping to inspire their Mar…