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1st Appearances 2021
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- 1st appearance of Andromeda
- 1st appearance of Bia, a transgender Amazon warrior
- 🗝 KEY OF THE WEEK: KEY COLLECTOR COMICS
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- 1st appearance of River, an ally of Echo
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- 1st team appearance of the Three Mothers
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- 1st full appearance of Lourna Dee
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- 1st appearance of Sian Holt, a private detective
- 1st appearance of Emerick Caphtor, a Jedi Knight
- 1st appearance of Keefar Branto
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- 1st appearance of the Deluge
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- 1st appearance of Selim, a clone of Miles Morales
- 1st cameo appearance of Shift and Mindspinner, clones of Miles Morales
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- 1st full appearance of Hunter's Moon
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- Premiere issue of the first ongoing Spawn title in 30 years
- 1st appearance of Komox
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- 1st appearance and origin of Jiang Li, Shang Chi's mother in what appears to be a retcon to the original introduction of an American version of the character from Special Marvel Edition #15 (1974)
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- 1st full appearance of Boushh
- Aside from a cameo in Star Wars Adventures #13, previous appearances of Boushh were Princess Leia in disguise
- Cover appearance of other Ubese bounty hunters
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- 1st appearance of the Unmaker
- Apocalypse and Vision redesign
- Miles Morales possesses a hybrid Venom/Carnage symbiote
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- 1st appearance of Captain America, Jeremy Merrick, an active duty Air Force soldier inspired by an individual that the writer met 20 years ago while working as a production assistant on a documentary
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- 1st appearance of Ty Yorrick
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- Stories told in the Tim Burton, Batman Universe
- Written by the screenwriter of Batman and Batman Returns
- 1st appearance of Robin, Drake Winston