Trivia: Stay after the end credits for an extra scene that sets up for the next movie, X-Men: Apocalypse. (02:10:50)
Trivia: When Quicksilver is breaking Magneto out of prison he states that his mom used to know a guy that could control metal, implying that Magneto is Quicksilver's father, just like in the comics.
Trivia: Magneto's line "I don't know karate, but I know crazy" comes from James Brown's 1973 hit "The Payback." Although the actual lyrics are "I don't know karate, but I know ka-razor."
Trivia: Because she suffered an allergic reaction to her Mystique makeup while filming the previous movie, Jennifer Lawrence wore a specially-made bodysuit for this movie.
Trivia: When Magneto gets his helmet back there are two more items in the room, the suit of Havok and one wing of Angel, both from X-Men: First Class. (01:31:55)
Trivia: Stan Lee didn't make his customary cameo as he was in Toronto at the Fan Expo and couldn't attend the filming in Montreal. He joked that the producers thought it would boost box office figures to omit his cameo, because viewers would think they must have missed it and go watch the film again to check.
Trivia: As the 20th Century Fox logo disappears at the start, the X in FOX stays on screen for a few extra seconds.
Trivia: An alternate version of the film, titled "The Rogue Cut," was released several months after the film debuted on DVD and Blu-Ray. This version of the film reinstates several key deleted scenes that were removed for pacing reasons. It is also notable for featuring the character Rogue in a larger role than seen in the theatrical version.
Trivia: This film sees Wolverine travelling to the distant past instead of Bishop, as Wolverine is determined to be the only suitable candidate. In the 90s animated series that similarly adapted this storyline from the comics, Bishop is the one who ends up travelling to the distant past, as he is determined to be a better candidate than Wolverine.
Trivia: Peter Dinklage was cast partially because of his dwarfism. Dinklage has also stated that it informs the character, as Trask is a bit of a "mutant" himself because of his height, and he hates how it makes him different... thus furthering his hatred of the mutants.
Trivia: Getting the character Quicksilver into the film was a bit of a legal minefield. Both Marvel Studios and Fox wanted to use the character in their own projects, but there wasn't any sort of formal agreement over him. Eventually, a resolution was reached - Quicksilver could appear in "Days of Future Past," but with no references to "The Avengers" or the Marvel Cinematic Universe. And he could similarly appear in "Avengers: Age of Ultron," so long as there were no references to mutants or the X-Men.
Trivia: Halle Berry was originally going to have a larger role but as she was pregnant during filming her scenes had to be limited to predominantly head shots.
Trivia: Ian McKellen and Patrick Stewart had aging makeup applied to them as they were in their mid 70s during filming, but their characters were supposed to be in their 80s/90s.
Answer: If you're referring to the behind-the-head headphones, NO! They were introduced in 1997: http://coolmaterial.com/roundup/history-of-headphones/.