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This character was created by Stan Lee and artist Jack Kirby. The Hulk first appeared in 1962.

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The Penguin is a deformed Gotham city mobster. He's one of the most enduring Batman villains.

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Iron Man belongs to DC and was not a major icon before the 2008 film starring Robert Downey Jr. as Tony Stark. This hit film spearheaded the entire Marvel cinematic universe.

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Black Panther first appeared in comics in the 1960s. This groundbreaking character was the first black hero in mainstream American comics.

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Lex Luthor is a brilliant super villain and business man. He is Superman's main antagonist and considered one of the best comic book villains of all time.

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Batwoman is an heiress who, inspired by Batman, chooses to use her wealth to help fight crime in Gotham. She first appeared in 1956.

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Poison Ivy is a botanist gone bad and classic Batman villain. She appeared first in the 1960s.

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Superman is one of the most enduring heroes of all time. He was created by Ohio high school students in the 1930s.

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Loki is a trickster god borrowed from Norse myth. He is Thor's adopted brother and often an unpredictable and unhinged antagonist.

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Batman is perhaps the most iconic superhero of all time. Also known as The Caped Crusader, he first appeared as a detective figure in 1939.

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Groot is a sentient tree-like extraterrestrial. Despite being portrayed as rather lovable in the "Guardians of the Galaxy" films," he began as a villainous invader in the 1960s.

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The Joker made his first appearance in the 1940s. As a Batman antagonist and super villain, he has been portrayed as both wacky and campy and dark and sadistic over the years.

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Thor is a hero and god taken from Norse myth. He is widely considered to be one of the greatest heroes of all time, with an over 50-year run.

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Catwoman first appeared in 1940. She is both Batman's love interest and one of the most enduring DC antagonists.

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Star-Lord began as an interplanetary crime fighter in the 1970s. The character has recently joined the Marvel cinematic universe.

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Captain America first appeared in comics in 1941. The character is a staple of the Marvel cinematic universe.

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Spider-Man is owned by Marvel. Stan Lee is one of the creators of this iconic hero.

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Nightwing most commonly refers to Robin, after he moves on from being Batman's sidekick. The character has origins in Superman stories, however, and first appeared in 1963.

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Green Arrow first appeared in 1941. He is both a billionaire businessman and a crime fighting archer.

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Harley Quinn is a lover and villain assistant of The Joker. She first appeared in the famous '90s cartoon "Batman: The Animated Series."

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Black Widow first appeared in Marvel comics in the 1960s. She was originally a villain before switching sides.

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Several characters have taken up the role of Flash. This super speedy character first appeared in 1940.

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Several characters have taken up the Green Lantern mantle throughout comic book history. The character fights crime throughout the universe using a magic ring.

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Supergirl is a cousin of Superman. She has similar powers to the iconic hero and shares his weakness for Kryptonite.

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Bane is one of Batman's most formidable foes. He appeared first in 1993.

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Aquaman first appeared in 1941 and is a founding member of the Justice League of America. He is the King of Atlantis and master of the sea.

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Wonder Woman was partially created by a psychiatrist in the 1940s, who was inspired by early feminists and his unconventional relationship with his wife. She is a founding member of the Justice League of America.

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Deadpool is a crass and unstable antihero that first appeared in comics in 1991. He is famous for breaking the fourth wall and a bizarre sense of humor.

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Wolverine first appeared in an Incredible Hulk comic in the 1970s, before later being revamped and joining the X-Men.

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Jessica Jones is an ex-superhero turned private investigator. She first appeared in 2001.

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James Gordon is the police commissioner of Gotham and a major ally of Batman. He was the first supporting Batman character ever introduced.

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Storm is a mutant and one of the X-Men. She first appeared in 1975 and is considered to be one of Marvel's most important superheroes.

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Luke Cage appeared first in the 1970s. He was the first black title character and protagonist in mainstream American comics.

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Mystique is an iconic shapeshifter known for her blue skin. She is a famous villain and has been an X-Men antagonist since the 1970s.

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Daredevil first appeared in the 1960s, but became an iconic part of the Marvel universe in the 1980s. Although blind, this hero has superhuman senses which allow him to fight crime.