Editing First appearance (section)

==First appearances of popular heroes, villains and teams==
<!--Please keep additions limited to very important heroes, villains or teams. Also no need to note Golden or Silver Age versions; that matter is covered above -->
{| class="wikitable sortable" width=100%
!width=29%|Character(s)
!width=28%|First Appearance
!width=13%|Cover Date
!width=18%|Publisher
|-
||[[Superman]]
||[[Action Comics 1|''Action Comics'' #1]]
||June 1938
||[[DC Comics]]
|-
||[[Batman]]
||[[Detective Comics 27|''Detective Comics'' #27]]
||May 1939
||DC Comics
|-
||[[Sandman (Wesley Dodds)]]
||''[[Adventure Comics]]'' #40
||July 1939
||DC Comics
|-
||[[Namor]]
||''[[Marvel Mystery Comics|Marvel Comics]]'' #1
|| October 1939
||[[Timely Comics]]
|-
||[[Flash (Jay Garrick)|Jay Garrick/Flash I]]; [[Hawkman]]
||''[[Flash Comics]]'' #1
||January 1940
||[[All-American Publications]]
|-
||[[Captain Marvel (DC Comics)|Captain Marvel]]
||''[[Whiz Comics]]'' #2
||February 1940
||[[Fawcett Comics]]
|-
||[[Robin (comics)|Robin]]
||''Detective Comics'' #38
||May 1940
||DC Comics
|-
||[[Spectre (DC Comics character)|The Spectre]]
||''[[More Fun Comics]]'' #52
||February 1940
||DC Comics
|-
||[[Lex Luthor]]
||''Action Comics'' #23
||May 1940
||DC Comics
|-
||[[Joker (character)|Joker]]; [[Catwoman]]
||''[[Batman (comic book)|Batman]]'' #1
||Spring 1940
||DC Comics
|-
||[[Green Lantern]]
||''[[All-American Comics]]'' #16
||July 1940
||All-American Publications
|-
||[[Captain America]]
||[[Captain America Comics 1|''Captain America Comics'' #1]]
||March 1941
||Timely Comics
|-
||[[Aquaman]]; [[Green Arrow]]
||''[[More Fun Comics]]'' #73
||November 1941
||DC Comics
|-
||[[Wonder Woman]]
||[[Introducing Wonder Woman|''All Star Comics'' #8]]
||December 1941
||All-American Publications
|-
||[[Black Canary]]
||''[[Flash Comics]]'' #86 
||August 1947
||All-American Publications
|-
||[[Barry Allen]]/[[Flash (comics)|Flash II]]
||''[[Showcase (comics)|Showcase]]'' #4
||October 1956
||DC Comics
|-
||[[Justice League]]
||''[[The Brave and the Bold]]'' #28
||May 1960
||DC Comics
|-
||[[Fantastic Four]]
||''[[Fantastic Four (comic book)|The Fantastic Four]]'' #1
||November 1961
||Marvel Comics
|-
||[[Hulk]]
||''[[The Incredible Hulk (comic book)|The Incredible Hulk]]'' #1
||May 1962
||Marvel Comics
|-
||[[Doctor Doom]]
||''The Fantastic Four'' #5
||June 1962
||Marvel Comics
|-
||[[Spider-Man]]
||[[Amazing Fantasy 15|''Amazing Fantasy'' #15]]
||August 1962
||Marvel Comics
|-
||[[Thor (Marvel Comics)|Thor]]
||''[[Journey Into Mystery]]'' #83
||August 1962
||Marvel Comics
|-
||[[Iron Man]]
||''[[Tales of Suspense]]'' #39
||March 1963
||Marvel Comics
|-
||[[Doctor Strange]]
||''[[Strange Tales]]'' #110
||July 1963
||Marvel Comics
|-
||[[X-Men]]; [[Magneto (Marvel Comics)|Magneto]]
||''[[Uncanny X-Men|X-Men]]'' #1
||September 1963
||Marvel Comics
|-
||[[Avengers (comics)|The Avengers]]
||''[[Avengers (comics)|The Avengers]]'' #1
||September 1963
||Marvel Comics
|-
||[[Daredevil (Marvel Comics series)|Daredevil]]
||''[[Daredevil (Marvel Comics series)|Daredevil]]'' #1
||April 1964
||Marvel Comics
|-
||[[Teen Titans]]
||''The Brave and the Bold'' #54
||July 1964
||DC Comics
|-
||[[Punisher|The Punisher]]
||[[The Amazing Spider-Man 129|''The Amazing Spider-Man'' #129]]
||February 1974
||Marvel Comics
|-
||[[Wolverine (character)|Wolverine]]
||''The Incredible Hulk'' #181
||October 1974
||Marvel Comics
|-
||[[Teenage Mutant Ninja Turtles]]
||''[[Teenage Mutant Ninja Turtles (Mirage Studios)|Teenage Mutant Ninja Turtles]]'' #1
||May 1984
||[[Mirage Studios]]
|-
||[[Venom (character)|Venom]]
||''The Amazing Spider-Man'' #300
||May 1988
||Marvel Comics
|-
||[[Deadpool]]
||''[[New Mutants]]'' #98
||February 1991
||Marvel Comics
|}