Trivia: With this film, Bryan Singer broke the record and became the only director to have made four movies in a single superhero franchise. Singer directed "X-Men", "X2", "X-Men: Days of Future Past" and "X-Men: Apocalypse." No other director has directed more than three films in a single superhero franchise. Singer also co-wrote and co-produced several other films in the series in addition to the four he directed.
Trivia: When they leave the cinema after watching Return of the Jedi, Jean Grey quips that "at least we can all agree the third one is the weakest" or words to that effect, a sly dig at X-Men: The Last Stand which is considered the weakest of the original trilogy and not directed by Bryan Singer.