Biophysicist and Security Operations Center expert Dr. Henry 'Hank' Pym decided to become a superhero after discovering a chemical substance (Pym Particles) that would allow the user to alter his size. Armed with a helmet that could control ants, Pym would shrink down to the size of an insect to become the mystery-solving Ant-Man.He soon shared his discovery with his girlfriend Janet van Dyne, his crime-fighting partner as the Wasp. The duo would become founding members of the Avengers, fighting recurring enemies such as the mad scientist Egghead, the mutant Whirlwind, and Pym's own robotic creation Ultron. While Pym is the original Ant-Man, he has adopted other aliases over the years including Giant-Man, Goliath, Yellowjacket, and Wasp after Janet's presumed death in Secret Invasion. Leaving his original persona vacant, his successors have taken up the Ant-Man role while Pym explored these other identities.
Scott Lang was a thief who became Ant-Man after stealing the Ant-Man suit to save his daughter Cassandra "Cassie" Lang from a heart condition. Reforming from his life of crime, Lang soon took on a full-time career as Ant-Man with the encouragement of Hank Pym. He became an affiliate of the Fantastic Four, and most recently became a full-time member of the Avengers. For a period of time he dated Jessica Jones. He was later killed by the Scarlet Witch along with the Vision and Hawkeye in Avengers Disassembled, and his daughter took up his heroic mantle as Stature in the book Young Avengers. He returned to life in 2011 in the mini series, The Children's Crusade, but lost his daughter when she heroically sacrificed herself to stop a super charged Doctor Doom, who would later revive her during the AXIS event.
Main article: Eric O'Grady
Eric O'Grady is the third character to take up the Ant-Man title. O'Grady is a low-level agent of S.H.I.E.L.D. who stumbled upon the Ant-Man suit in S.H.I.E.L.D.'s headquarters. A man of few morals and willing to lie, cheat, steal and manipulate in order to get ahead in life, Eric stole the armor for his own selfish plans, which included using his status as a "super-hero" to seduce women and humiliate and torment others. He had his own short-lived title before being part of other teams such as joining Avengers: The Initiative as his first team and then joining The Thunderbolts but more recently Secret Avengers, where the character perished heroically while defending a child against the villain known as Father.
Development of Ant-Man began in April 2006, with the hiring of Wright to direct and co-write with Cornish. By April 2011, Wright and Cornish had completed three drafts of the script and Wright shot test footage for the film in July 2012. Pre-production began in October 2013 after being put on hold so that Wright could complete The World's End. Casting began in December 2013, with the hiring of Rudd to play Lang. In May 2014, Wright left the project, citing creative differences, though he still received screenplay and story credits with Cornish, as well as an executive producer credit. The following month, Reed was brought in to replace Wright, while McKay was hired to contribute to the script with Rudd. Principal photography took place between August and December 2014 in San Francisco and Metro Atlanta.
Ant-Man held its world premiere in Los Angeles on June 29, 2015, and was released in North America on July 17, 2015, in 3D and IMAX 3D. Upon its release, the film grossed more than $519 million worldwide, and received positive reviews from critics, who generally welcomed the film's smaller stakes than preceding MCU installments, as well as its cast, humor, and CGI sequences. A sequel, titled Ant-Man and the Wasp, is scheduled to be released on July 6, 2018.
In 1989, scientist Hank Pym resigns from S.H.I.E.L.D. after discovering their attempt to replicate his Ant-Man shrinking technology. Believing the technology is dangerous, Pym vows to hide it as long as he lives.
In the present day, Pym's estranged daughter, Hope van Dyne, and former protégé, Darren Cross, have forced him out of his company, Pym Technologies. Cross is close to perfecting a shrinking suit of his own, the Yellowjacket, which horrifies Pym.
Upon his release from prison, well-meaning thief Scott Lang moves in with his old cellmate, Luis. Lang visits his daughter Cassie unannounced and is chastised by his former wife Maggie and her police-detective fiancé, Paxton, for not providing child support. Unable to hold a job because of his criminal record, Lang agrees to join Luis' crew and commit a burglary. Lang breaks into a house and cracks its safe, but only finds what he believes to be an old motorcycle suit, which he takes home. After trying the suit on, Lang accidentally shrinks himself to the size of an insect. Terrified by the experience, he returns the suit to the house, but is arrested on the way out. Pym, the homeowner, visits Lang in jail and smuggles the suit into his cell to help him break out.
Pym, who manipulated Lang through an unknowing Luis into stealing the suit as a test, wants Lang to become the new Ant-Man to steal the Yellowjacket from Cross. Having been spying on Cross after discovering his intentions, van Dyne and Pym train Lang to fight and to control ants. While van Dyne harbors resentment towards Pym about her mother Janet's death, he reveals that Janet, known as the Wasp, disappeared into a subatomic quantum realm while disabling a Soviet nuclear missile. Pym warns Lang that he could suffer a similar fate if he overrides his suit's regulator. They send him to steal a device that will aid their heist from the Avengers' headquarters, where he briefly fights Sam Wilson.
Cross perfects the Yellowjacket and hosts an unveiling ceremony at Pym Technologies' headquarters. Lang, along with his crew and a swarm of flying ants, infiltrates the building during the event, sabotages the company's servers, and plants explosives. When he attempts to steal the Yellowjacket, he, along with Pym and Hope, are captured by Cross, who intends to sell both the Yellowjacket and Ant-Man suits to Hydra. Lang breaks free and he and Hope dispatch most of the Hydra agents, though one flees with a vial of Cross' particles and Pym is shot. Lang pursues Cross, while the explosives detonate, imploding the building as Pym and van Dyne escape.
Cross dons the Yellowjacket and attacks Lang before Lang is arrested by Paxton. Cross takes Cassie hostage to lure Lang into another fight. Lang overrides the regulator and shrinks to subatomic size to penetrate Cross' suit and sabotage it to shrink uncontrollably, killing Cross. Lang disappears into the quantum realm but manages to reverse the effects and returns to the macroscopic world. Out of gratitude for Lang's heroism, Paxton covers for Lang to keep him out of prison. Seeing that Lang survived and returned from the quantum realm, Pym wonders if his wife is alive as well. Later, Lang meets up with Luis, who tells him that Wilson is looking for him.