Interesting Trivia: X-Men: Days of Future Past (Behind the Scenes)

You can check out cool facts in this X-Men: Days of Future Past Trivia Breakdown.

• The filmmakers selected the "Days of Future Past" storyline because it would allow the filmmakers to reconcile any continuity dissonances within the X-Men film franchise.
• This is the first X-Men film ever to be nominated for an Oscar, Best Visual Effects.
• Angel, Azazel, Riptide and Emma were originally going to return, but when the filmmakers decided to go with the "Days of Future Past" story, they had them all killed-off.
• Young Xavier's alcoholism is presumably a reference to his mother Sharon becoming a drunk not long after the death of her first husband in the comics.

The film establishes the reset timeline.

• The original "Days of Future Past" comic mentioned time travel from the year 2013, the same year in which filming began. In the film, the future action is implied to take place in 2023.
• In the original comic storyline, Marvel heroes other than the X-Men are wiped out by the Sentinels, such as Spider-Man, Ghost Rider, Daredevil, Iron Man, Hulk, the Fantastic Four and someone who looks like the Silver Surfer, but is more likely Bobby Drake (Iceman).
• Bishop is the first mutant Kitty Pryde sends through time. This is an homage to Bishop being a frequent time-traveler in the X-Men comics.
• Quicksilver's slow-motion sequence was filmed with mostly practical visual effects, high-speed photography and stunt rigs, with CGI used only for the objects in mid-air.
• At around one minute, an older version of Ink is visible in the Mutant Internment Camp scene early in the film. He is accompanied by an older version of Sabretooth.
• Although Anna Paquin's screentime is only three seconds, and she has no lines, she still was one of the top billed cast members during the ending credits. But the extended cut of the film restores a subplot in which she features prominently and has therefore; has been dubbed as "X-Men: Days of Future Past: The Rogue Cut".

A life-size model of a 1973 Sentinel robot was constructed for filming.

• In the "Days of Future Past" comic, it was Kitty Pryde who went back in time. But in the film, it was Wolverine. According to writer Simon Kinberg, Kitty was intended to be the time-traveler, but it did not work out; "Kitty in the era of young Magneto and Xavier would have been 20 years old. The reflex response to that was a character who does not age. Wolverine is the only character who would look the same in 1973 as he does in the future". Therefore; Wolverine was picked for being an ageless immortal character who would bridge the past and future.
• At around one minute, at the beginning, as the mutants and humans march down the corridor, a quick glimpse of an older Quicksilver from behind. He is directly in the center of the frame and is easy to spot with the same hairstyle, and hat his younger self has in the film.
• At around one hour and fifty-five minutes in her cameo, Rogue is seen wearing her trademark green jacket and pants from the comic books.
• Peter Maximoff is never called Quicksilver in the film. He is always being referred to as Peter.
• At around two hours and ten minutes in the post-credits scene, the pan around to the front of the character building the pyramids reveals the silhouette of four individuals on horseback. These are the Four Horsemen of Apocalypse, four super-soldiers he converted and enslaved.