Mythology Gag / X-Men: Days of Future Past

• Wolverine's future outfit has yellow and blue elements as a nod to his classic comic book outfit. It also serves as a Call-Back to Cyclops's comment about "yellow spandex" in the first X-Men film. His outfit in 1973 is identical to the one the future Wolverine wore in the original comic storyline.
• The Sentinels, particularly those from the X-Men's Bad Future, possess elements of Bastion and Nimrod. The claws they occasionally sprout are clearly based on those of Lady Deathstrike.
• When Beast asks Wolverine if he's a parent, he sneers and replies "Sure as hell hope not."
• In the original comic storyline, Kitty was the one who was sent to the past. In the film, she's the one who sends Wolverine back.
• Bishop, the one who got sent back in the "Days of Future Past" arc in the 1990s animated series, is one of the future X-Men, and Kitty mentions that he is her usual target of Mental Time Travel in avoiding Sentinel attacks.
• Beast is able to hide his mutant appearance by using a formula that hinges on the suppression of his rage, much like his debut episode in X-Men: Evolution.
• Quicksilver's quip to Magneto: "So, they told me you control metal. My mom once knew a guy who could do that." Erik is his father in the comics (and in the film, though it's not revealed until X-Men: Apocalypse).
• Quicksilver has a little brown-haired girl on his lap while watching TV. The girl is either Wanda Maximoff a.k.a. The Scarlet Witch or, based on a cut scene in which Quicksilver and the little girl's mom tells her to "go up and bug your sister," Lorna Dane a.k.a. Polaris as in the "House of M" timeline (given Peter and Wanda are twins and Polaris is only their half-sister, probably the latter). The credits themselves only identify her as Quicksilver's sister.
• Colossus and Kitty are shown teaching a class together, referencing their relationship in the comics.
• Storm's death in the Bad Future is the same as her death in the original comic — skewered by a Sentinel through her torso.
• Bad Future Magneto levitates the Blackbird's scrap metal for offense and defense. This is exactly how CPU Magneto's Magnetic Tempest rips apart the parked Blackbird in the final stage of X-Men: Children of the Atom.
• When Charles attempts a psychic link on Raven, she utters "Get out of my head, Charles!" This line is often said by Juggernaut, Charles' stepbrother in the comics.
• The scene where Magneto embeds Wolverine's body with steel bars resembles a famous comic panel of Magneto ''removing'' Wolverine's adamantium skeleton◊.
• Erik throws Logan into the Potomac River and leaving him to drown is a reference to Ultimate X-Men where Sabertooth once considered drowning as the only thing to which Wolverine's healing factor is vulnerable. Needless to say, this is the closest Wolverine has come to dying in the film series.
• The future Sentinels copying and adapting to mutant powers is similar to what they did in Wolverine and the X-Men (2009).
• Quicksilver wears a pair of goggles while using his powers, much like his nephew Speed from the Young Avengers.
• With help from Blink, Colossus pulls off his Super Dive attack from X-Men: Children of the Atom and subsequent Marvel vs. Capcom games.
• Blink wasn't in the original comics "Days of Future Past", but she was in "Age of Apocalypse," a different bleak timeline.
• Magneto using Sentinels to attack the White House and attempt to kill the President before being stopped by Xavier's telepathy is taken from the climax of the first arc from Ultimate X Men.
• Before deciding on Wolverine, the Bad Future mutants plan on sending Xavier's mind back in time. His mind was the one sent back in Wolverine and the X-Men.
• While Wolverine wasn't the one sent back in the original comic storyline, he did get sent back in similar stories, such as Frank Tieri's "Weapon X: Days of Future Now" or in the Ultimate Universe, as the Ultimate version of Cable.
• Future Wolverine's hair is shown to be greying at the temples, similar to the future Wolverine of the original comic story.
• In a deleted scene, Logan and Ororo share a kiss before Wolverine is sent back in time. In the comics and animated series, Bad Future Wolverine and Storm are lovers.
• The plot point involving Hank's restorative serum, wherein Professor Xavier overcomes his paralysis at the cost of his telepathic abilities, is based on the period in the 1980's when Xavier did just that, though for different reasons. ^note  In the comics, Xavier regained the use of his legs after the Shi'ar transplanted his mind into a clone body, as his original body was destroyed in a battle with the Brood. He had to give up his telepathy in order to keep the psychosomatic pain in his legs at bay, and spent some time exploring the galaxy with Lilandra Neramani as a normal human.
• Magneto gained control of the Sentinels, just like in the X Men arcade and the Wolverine and the X-Men animated series.
• Imprisoned mutants in the future have the letter M branded over the right eye, which is done to mutants in Bishop's native future timeline in the comics. That world is similar to the original "Days of Future Past", but separate.
• Peter keeps his habit from X-Men Evolution of being a kleptomaniac simply because he gets bored.
• Future Xavier has a floating "wheelchair," just as he did in the comics during the '90s and the animated series around the same time.
• Quicksilver's Bullet Time scene may be a reference to his Ultimate counterpart, who claims to regularly do this (which is later proven correct) and it's shown that even a small impact from him can greatly injure someone.
• Past 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. It may be a case of Like Mother, Like Son because Charles reaches for the bottle when he cannot cope with profound loss.
• A Power Nullifier restores Charles Xavier's ability to walk and he loses that ability once he regains his powers. It also happens to him in the 1990s animated series. Similar to what also happened in the "Savage Land" story arc, he is also forced to team up with Magneto here as well.
• Xavier being depressed over the deaths of his students and being looked after by Hank in his mansion is his situation in a What If? story where the second team he sent after Krakoa died and circumstances lead him to making a new one.