There was a time when the X-Men franchise was the best in the business. The first film, released in 2000, really was the first big-budget comic book-based film. The sequel, which brilliantly titled “X-Men 2”, was considered better than the first. Then writer/director Bryan Singer left and “X-Men: The Last Stand” and “X-Men Origins: Wolverine” were released, both being met with mixed reviews, and even some hate from fans. Hope seemed lost. Then a very successful prequel, “X-Men: First Class”…