Major Key
Amazing Spider-Man Annual #16
First appearance and origin of Monica Rambeau as Captain Marvel.
View key issue guideMarvel & DC Key Comic Issues
Explore 279 collector guides covering major and minor Marvel & DC comic milestones.
Major Key Comic Issues
Browse major milestones, debuts and defining comic-book keys.
279 major key issues
Major Key
Incredible Hulk #271
First comic-book appearance of Rocket Raccoon in the mainstream Marvel Universe.
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Major Key
New Mutants – Marvel Graphic Novel #4
First appearance and formation of the New Mutants.
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Major Key
Avengers #227
Monica Rambeau formally joins the Avengers, establishing her as a full member of the team.
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Major Key
Thor #338
Beta Ray Bill’s worthiness leads to a decisive contest over the power of Thor.
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Major Key
Amazing Spider-Man #252
First appearance of Spider-Man's black costume in the main title.
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Major Key
Batman #368
Jason Todd formally takes over as Robin in the pre-Crisis era.
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Major Key
The Saga of the Swamp Thing #21
'The Anatomy Lesson' radically redefines Swamp Thing.
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Major Key
Thor #339
First appearance of Stormbreaker, Beta Ray Bill’s enchanted hammer.
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Major Key
Avengers #257
First appearance of Nebula, the spacefaring villain who claims a connection to Thanos and becomes a recurring figure in Marvel’s cosmic stories.
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Major Key
Crisis on Infinite Earths #7
Pivotal sacrifice of the pre-Crisis Supergirl.
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Major Key
Iron Man #200
Tony Stark returns to the Iron Man role in a major confrontation with Obadiah Stane.
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