Following the “Days of Future Past” storyline from the comics and connecting the worlds of the original X-Men films and X-Men: First Class required a lot of mutants from the Marvel Universe.
Here is a list of every known mutant from X-Men: Days of Future Past with a brief description of their abilities and their role in the film. (Here is a video and explanation of the post-credit scene if you need it.)
Wolverine – The most iconic member of the X-men, “Logan” possess superhuman strength, senses and the ability to quickly heal himself. His bone claws, as well as his entire skeleton, were later coated in adamantium, the strongest known metal. He is the main protagonists with his future self going back to inhabit the mind of his previous self and attempt to change history.
Professor X – Charles Xavier lost the use of his legs, but is perhaps he world’s most powerful telepath. He created the X-men to help humans and mutants live together peacefully as equals. He appears in both the future and in the past trying to help Wolverine.
Magneto – Friend and foe of Professor X, Magneto can control all types of magnetism and metal. He is one of the most powerful mutants in the world. He appears in both times as well, but his allegiances are always questionable.
Mystique – She is a shapeshifter, who, despite her usual blue appearance, can transform her appearance into that of any other person. She is the main target of the story line set in the past.
Beast – Covered in blue skin and fur, Hank McCoy is a brilliant scientist with superhuman strength and animal senses. He is the only mutant still with Charles Xavier in the past, prior to Wolverine’s arrival.
Kitty Pryde – She and anyone touching her can walk through solid objects. She also has the power to send someone’s consciousness back into time. She is in the future and is the one to send Wolverine back in time.
Iceman – Shockingly enough, he has the power to turn his body and anything around him to ice. He is in the future war and is a love interest of Kitty.
Bishop – A time traveling mutant from the future, he can absorb energy and redirect it as blasts. He is part of the war in the future.
Quicksilver – He moves and thinks at superhuman speeds. He is also Magneto’s son. He is in the past and helps Wolverine at a crucial point.
Colossus – Able to transform his entire body into organic steel, he has superhuman strength and is almost invincible in his metal form. He is only in the future.
Storm – An extremely powerful mutant with the ability to control all forms of weather. This also enables her to fly. She is only part of the future storyline.
Blink – She has the ability to create portals to teleport her, anyone or anything somewhere else. She is only in the future.
Sunspot – He can absorb and channel solar energy to give himself superhuman strength and increase his resistance to injury. He is part of the future resistance.
Warpath – An Apache warrior, he possess superhuman abilities in virtually all areas including strength, injury resistance and senses. He is only in the future.
Havok – He is the younger brother of Cyclops, at least in the comics, and has the ability to absorb cosmic energy and shoot it from his body. He is one of the mutants in the past who were rescued by Mystique from Vietnam, where William Stryker was attempting to ship them to Trask Industries.
Toad – He has super strong legs and can leap long distances. He also has a long poisonous tongue. He is with Havok.
Ink – Special mutant tattoos give him specific abilities for each marking. He is with Havok and Toad.
The first three of these make return appearances after Wolverine is able to reset the timeline. Beast also returns to the future after being killed previously.
Jean Grey – One of the most powerful telepathic and telekinetic mutants, she can access the Phoenix Force and become much more powerful and dangerous. Though Wolverine has been in love with her, she is the wife of Cyclops.
Cyclops – The field leader of the X-Men, his eyes shoot powerful optic blasts which he can only control with special glasses or visor.
Rogue – She can absorb (and sometimes remove) the memories, physical strength, and superpowers of anyone she touches. In the comics, Rogue is also the love-interest of the X-Men Gambit (who is set to appear in X-Men: Apocalypse) and adopted daughter of Mystique. In this film, she appears to be with Iceman once the timeline is corrected.
Toward the end of the movie, Quicksilver is shown holding a little girl. Many thought this would be his sister Scarlet Witch. Bryan Singer confirmed it was not, but originally the little girl was supposed to reference another sister, which was intended to be an allusion to Scarlet Witch. But that line was cut from the final film. (Thanks to commenter Pavan for reminding me of this.)
Scarlet Witch – She can send “hexes” which alter the probability of events happening. This gives her the power to cause explosions, stop bullets and create forcefields. She is Quicksilver’s twin sister and daughter of Magneto. (The duo, played by different actors, did appeared at the end of Captain America: Winter Solider and will be featured in Avengers: Age of Ultron.)
In the X-Men Days of Future Past post-credit scene, a future villain of the X-Men is revealed.
Apocalypse – One of the oldest and most powerful mutants ever, he has superhuman abilities in virtually every area, which are also augmented with advanced alien technology.
Are there any from the movie that I missed? Which mutants would you like to see in the X-Men: Apocalypse? Personally, I’m excited about seeing Gambit.