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1st Appearances 2021
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- 1st appearance Braincells, the advanced offshoot of Brainiac
- 1st appearance of Honest Mary
- 1st appearance of Andrej Trojan
- Reintroduction of the Manhattan Guardian and Shilo Norman, Mister Miracle
- 1st cameo team appearance of the Time Luchadores, Golden Gods of Creon and the Five Empires
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- 1st full appearance of Yara Flor, the Brazilian Wonder Woman
- 1st appearance of Caipora
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- 1st team appearance of the Valkyries: Jane Foster, Hildegarde, Dani Moonster, unnamed Valkyrie
- 1st appearance of a new Valkyrie, based off of the MCU version of Brunnhilde
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- 1st full appearance of Peacekeeper-01
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- 1st team appearance of the Justice League: Jon Kent (Superman), Tim Fox (Batman), Yara Flor (Wonder Woman), Jo Mullein (Green Lantern), Andy Curry (Aquawoman), Flash (Multiverse)
- 1st team appearance of Hyperclan (Future State): A-Mortal, Armek, Fluxus, Primaid, Tronix, Zenturion, ZuM
- 1st cameo appearance of the Crow King, Merlin
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- 1st appearance of Darcy, an ally of Tim Drake
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- 1st appearance of Swamp Thing Supreme
- 1st cameo appearance of Woodrue Wilson, the Undying Man
- 1st cameo appearance of the Obsidian Sun
- 1st appearance of Indigo, Vruk, Calla and Heather, allies of Swamp Thing
- 1st cameo appearance of Bougan
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- 1st appearance of Red X in the mainstream DC universe
- 1st appearance of Cybeast, the result of Beast Boy and Cyborg merged into one
- 1st appearance of the Future State Teen Titans: Nightwing, Raven, Crush, Jakeem Thunder, Bunker, Starfire, Red X, Red Arrow
- *Red X appeared in the comic Teen Titans Go #23 (2005) but it was revealed to be a robot
- 1st appearance of Bratgirl, Totally Tubular, Gorilla Gregg and Johnny Chupacabra
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- 1st appearance of Siren, an android introduced in the back-up story 'Gotham City Sirens'
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- 1st team appearance of the Last Amazons
- Back-up story featuring Nubia as Wonder Woman. It also introduces her Aunt who might play a bigger role
- First interior art by Jen Bartel for DC Comics
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- Two part series featuring Task Force X versus Amanda Waller and an Earth 3 Justice League
- Back up story featuring Black Adam that introduces a new threat spawned from a former hero
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- 1st appearance of Zeen and Krix
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- 1st appearance of a deadly new threat born from the ashes of the Teen Titans Academy: Raven!
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- 1st appearance of Rowan Kent, the new Superman of Earth and son of Jon Kent
- 1st appearance of Ronan Kent, a Blue Lantern and Daughter of Jon Kent
- 1st appearance of the Red King
- Appearance of the Black Racer
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- 1st appearance of the Drengir, a sentient species of plant-life who wish to reap a terrible harvest across the galactic frontier
- *the Drengir along with the Nihl are two major antagonists in the High Republic
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- 1st appearance and origin of Sherlock, a new female G.I. Joe
- Find more upcoming Key Issues through MARCH 2021 under the category FUTURE KEYS
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