The Marvel Cinematic Universe (MCU) media franchise features many fictional elements, including locations, weapons, and artifacts. Many are based on elements that originally appeared in the American comic books published by Marvel Comics, while others were created for the MCU.
What If, sometimes stylized as What If…?, is a comic book anthology series published by Marvel Comics whose stories explore how the Marvel Universe might have unfolded if key moments in its history had not occurred as they did in mainstream continuity. Since What If debuted in 1977, the comics have been published in 14 series as well as occasional stand-alone issues. In 2024, Marvel announced that What If…? would expand to include alternate explorations of continuity within other non-Marvel Universe properties owned by their parent company The Walt Disney Company from its fifteenth volume onwards, beginning with Aliens: What If…?, based on the Alien franchise.
Mjolnir, known more formally as Mjölnir, is a fictional magical weapon appearing in American comic books published by Marvel Comics. It is depicted as the principal weapon of the superhero Thor. Mjolnir, which first appears in Journey into Mystery #83, was created by writers Stan Lee and Larry Lieber and designed by artists Jack Kirby and Joe Sinnott.
The Avengers are a superhero team created by Marvel Comics that appear in comic books. Aside from comics, the Avengers appear in various forms of media such as in novels, television shows, movies, videogames and stage shows.
Erik Selvig is a fictional character portrayed by Stellan Skarsgård in Marvel Cinematic Universe films Thor (2011), The Avengers (2012), Thor: The Dark World (2013), Avengers: Age of Ultron (2015), and Thor: Love and Thunder (2022) as an astrophysicist who becomes involved with the Asgardian Thor and the government organization S.H.I.E.L.D. To tie into these appearances, the character is seen in several MCU tie-in comics. The character also appears in other media, including non-MCU comics published by Marvel Comics. He was also the main protagonist of the 2018 tie-in prose novel The Cosmic Quest Volume Two: Aftermath.
The Marvel Cinematic Universe tie-in comic books are limited series or one-shot comics published by Marvel Comics that tie into the films and television series of the Marvel Cinematic Universe (MCU). The comics are written and illustrated by various individuals and each typically consists of one to four issues. They are intended to tell additional stories about existing characters, or to make connections between MCU projects, without necessarily expanding the universe or introducing new concepts or characters.
The Infinity Stones are fictional items in the Marvel Cinematic Universe (MCU) media franchise, based on the Infinity Gems of the Marvel Comics. As expounded across several interwoven MCU multimedia titles, the six Infinity Stones are reputed to embody and control essential aspects of existence—Space, Mind, Reality, Power, Time and Soul—thereby making them critical artifacts in the MCU and, together, the MacGuffin of the dedicated Infinity Saga.
Avengers: Infinity War and Avengers: Endgame are American superhero films based on the Marvel Comics superhero team the Avengers, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. They are the sequels to The Avengers (2012) and Avengers: Age of Ultron (2015), and respectively serve as the 19th and 22nd films of the Marvel Cinematic Universe (MCU). Both films were directed by Anthony and Joe Russo from screenplays by the writing team of Christopher Markus and Stephen McFeely. They feature an ensemble cast composed of many previous MCU actors, headlined by Robert Downey Jr., Chris Hemsworth, Mark Ruffalo, Chris Evans, Scarlett Johansson, Don Cheadle, Karen Gillan, Bradley Cooper, Gwyneth Paltrow, and Josh Brolin. In Infinity War, the Avengers and the Guardians of the Galaxy fail to prevent Thanos from collecting the six all-powerful Infinity Stones and he uses them to kill half of all life in the universe. In Endgame, the surviving Avengers and their allies attempt to reverse Thanos's actions.
Anthony Edward Stark, or Tony Stark, is a fictional character primarily portrayed by Robert Downey Jr. in the Marvel Cinematic Universe (MCU) media franchise —based on the Marvel Comics character of the same name— commonly known by his alias, Iron Man. Stark is initially depicted as an industrialist, genius inventor, and former playboy who is CEO of Stark Industries. Initially the chief weapons manufacturer for the U.S. military, he has a change of heart and redirects his technical knowledge into creating mechanized suits of armor, which he uses to defend Earth.
Doctor Stephen Vincent Strange is a superhero portrayed by Benedict Cumberbatch in the Marvel Cinematic Universe (MCU) media franchise—based on the Marvel Comics character of the same name, commonly referred to by his academic title. Initially depicted as an intelligent and arrogant neurosurgeon, Strange experiences a career-ending car accident. In his search to repair his damaged hands, he discovers magic from Kamar-Taj. He becomes a Master of the Mystic Arts, using his newfound powers to protect the Earth from various threats.
Thor Odinson is a fictional character portrayed by Chris Hemsworth in the Marvel Cinematic Universe (MCU) media franchise, based on the Marvel Comics character of the same name and the Norse mythological god of thunder. In the MCU, he is depicted as one of the most powerful Asgardians, an ancient alien civilization with long ties to Earth, who humans consider to be gods. Thor wields a powerful hammer called Mjolnir, and is initially depicted as the arrogant heir to the throne of Asgard whose brash behaviors causes turmoil among the Nine Realms under Asgard's protection. This brings him into conflict with his villainous adopted brother, Loki, the god of mischief.
Dr. Robert Bruce Banner, more commonly known as Bruce Banner, or his alter ego, the Hulk, is a fictional character in the Marvel Cinematic Universe (MCU) media franchise originally portrayed by Edward Norton and subsequently by Mark Ruffalo—based on the Marvel Comics character of the same name. Banner is depicted as a genius physicist who, after a failed experiment to replicate a super soldier program using gamma radiation, transforms into a large, muscular creature with green skin whenever his heart rate goes above 200 beats per minute or when facing mortal danger. As the Hulk, he possesses superhuman abilities, including increased strength and durability.
Steven Grant Rogers is a superhero primarily portrayed by Chris Evans in the Marvel Cinematic Universe (MCU) media franchise—based on the Marvel Comics character of the same name—commonly known by his alias, Captain America. Rogers is depicted as a World War II-era super soldier who was given a serum that provided him with superhuman abilities, including enhanced durability, strength, and athleticism. During his fight against the Nazi secret organization Hydra, he was frozen in the Arctic for nearly seventy years until being revived in the 21st century.
Clinton Francis Barton is a fictional character portrayed by Jeremy Renner in the Marvel Cinematic Universe (MCU) media franchise—based on the Marvel Comics character of the same name—more commonly known by his alias, Hawkeye. Barton is depicted as an expert marksman, archer, and hand-to-hand combatant, with his preferred weapon being a recurve bow. Barton, an agent of S.H.I.E.L.D., is sent to kill Natasha Romanoff but decides to recruit and befriend her instead.
The Avengers are a team of fictional superheroes and the protagonists of the Marvel Cinematic Universe (MCU) media franchise, based on the Marvel Comics team of the same name created by Stan Lee and Jack Kirby in 1963. Founded by S.H.I.E.L.D. Director Nick Fury, the team is a United States–based organization composed primarily of superpowered and gifted individuals, described as "Earth's Mightiest Heroes", who are committed to the world's protection from a variety of threats. The Avengers are depicted as operating in the state of New York: originally from the Avengers Tower in Midtown Manhattan and subsequently in the Avengers Compound in Upstate New York. Arranged as an ensemble of core MCU characters originally consisting of Tony Stark / Iron Man, Steve Rogers / Captain America, Thor Odinson, Bruce Banner / Hulk, Natasha Romanoff / Black Widow, and Clint Barton / Hawkeye, it later expands to include 16 total members. Regarded as an important part of the franchise, they are central to the MCU's first 23 films, collectively known as the Infinity Saga. The Avengers from alternate universes were depicted in subsequent MCU properties across the Multiverse Saga, including appearances in the Disney+ animated series What If...? (2021–present) and Doctor Strange in the Multiverse of Madness (2022). A new incarnation of the Avengers are set to return in Avengers: Doomsday (2026) and Avengers: Secret Wars (2027). Both films will be part of the MCU's Phase Six, concluding the Multiverse Saga.
Mjölnir and Stormbreaker, in the Marvel Cinematic Universe (MCU), are sentient enchanted weapons of choice used by Thor. Both are melee weapons and were created out of Uru metal forged with the heat of a dying star in the Dwarven kingdom of Nidavellir, with the assistance of the dwarf king and master weapon-maker Eitri. Mjolnir is a hammer, and was enchanted by Thor's father, Odin, so that only those the hammer deemed "worthy" are capable of wielding or even lifting it. Stormbreaker is an axe, and although it does not have such a worthiness enchantment, its power is such that a mere mortal attempting to wield it would be driven mad.
The Marvel Cinematic Universe (MCU) is an American media franchise and shared universe centered on superhero films/other series starring various titular superheroes independently produced by Marvel Studios: based on characters that appear in American comic books published by Marvel Comics. The shared universe, much like the original Marvel Universe in comic books, was established by crossing over common plot elements, settings, cast, and characters. Due to the galaxy-spanning nature of the franchise, multiple different species have been introduced.
The Marvel Cinematic Universe (MCU) is an American media franchise and shared universe centered on superhero films and other series starring various titular superheroes independently produced by Marvel Studios and based on characters that appear in American comic books published by Marvel Comics. The shared universe, much like the original Marvel Universe in comic books, was established by crossing over common plot elements, settings, cast, and characters. Over the course of the films and related media, several teams and organizations have been formed, each with different aims and purposes.
"What If... the Watcher Broke His Oath?" is the ninth episode and season finale of the first season of the American animated television series What If...?, based on the Marvel Comics series of the same name. It continues the previous episode's story, featuring the Watcher and Doctor Strange Supreme recruiting various heroes from parallel realities to fight against an alternate version of Ultron. The episode was written by head writer A. C. Bradley and directed by Bryan Andrews.
The multiverse is a fictional setting within the Marvel Cinematic Universe (MCU) media franchise. Based on the setting of the same name from the Marvel Comics, it is a collection of infinitely many alternate realities and dimensions. First explored in the film Doctor Strange (2016), it is revisited in the film Avengers: Endgame (2019) before playing a key role in Phases Four, Five, and Six of the MCU, which constitute "The Multiverse Saga". The MCU's multiverse centers on a universe called the "Sacred Timeline". Alternative universes are generally "pruned" by the Time Variance Authority (TVA), until Sylvie kills TVA's leader, "He Who Remains", allowing new universes to form.