Dr. Fate and Doctor Strange
[ranking: 5]
Similarities: Sorcerers/doctors who wield powerful amulets to fight the evil doers of the magic worlds.
Dr. Fate first appearance: More Fun Comics #55 in May 1940Doctor Strange first appearance: Strange Tales #110 in July 1963
Deadshot and Bullseye
[ranking: 6]
Similarities: Hired assassin enemies of a vigilante superhero. Expert marksmen who claim to "never miss."
Deadshot first appearance: Batman #59 in June/July 1950Bullseye first appearance: Daredevil #131 in March 1976
Zatanna and Scarlet Witch
[ranking: 9]
Similarities: Powerful leotard clad magicians with powerful fathers, and who are both associated with a team of super powered individuals.
Zatanna first appearance: Hawkman #4 in October 1964Scarlet Witch first appearance: The X-Men #4 in March 1964
Batman and Iron Man
[ranking: 11]
Similarities: Egotistical billionaires (one who's always, one who dons it as a facade) who use their wealth to build a suit and many toys to fight crime.
Batman first appearance: Detective Comics #27 in May 1939Iron Man first appearance: Tales of Suspense #39 in March 1963
Solomon Grundy and Hulk
[ranking: 10]
Similarities: Anti-heroes with super strength, healing factor, and virtually indestructible (and Hulk was originally gray).
Solomon Grundy first appearance: All-American Comics #61 in October 1944Hulk first appearance: The Incredible Hulk #1 in May 1962
Catwoman and Black Cat
[ranking: 1]
Similarities: Black latex clad cat-thieves who commonly gets romantically involved with their sometimes enemy/sometimes ally.
Catwoman first appearance: Batman #1 in Spring 1940Black Cat first appearance: The Amazing Spider-Man #194 in July 1979
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