Unofficial DC K.O. Index

DC K.O. #1

Cover Date: December 2025
Cover Price: $4.99
Publication Date: 2025-10-08

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Cover Credits:
Art: Javier Fernandez (signed)
Colors: Alejandro Sánchez (signed)

Variant Covers:

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Story: "K.O. Chapter One: Into the Ring" (44 Pages)

Credits:

Story	Scott Snyder
Art	Javi Fernandez, Xermanico (interlude)
Colors	Alejandro Sánchez
Lettering	Hassan Otsmane-Elhaou
Associate editing	Marquis Draper
Editing	Paul Kaminski

Feature Character(s):

Justice League Unlimited

Aquaman (last in Justice League: The Omega Act Special #1; in flashback in Superman Vol. 6 #32 in between pages 33 and 40)

Batman (appears in Superman Vol. 6 #31 in between pages 32 and 33; also in flashback in between Justice League: The Omega Act Special #1 and flashback in Superman Vol. 6 #31, and in flashback in between Titans Vol. 4 #27 and main story; also in a vision of a possible future; dies)

Batwoman (last in Justice League: The Omega Act Special #1; in flashback in Superman Vol. 6 #32 in between pages 32 and 40; also in a vision of a possible future)

Big Barda (last in flashback in Superman Vol. 6 #32)

Black Lightning (last in Justice League: The Omega Act Special #1; in flashback in Superman Vol. 6 #32 in between pages 33 and 40)

Blue Beetle (Jaime Reyes; last in Justice League: The Omega Act Special #1; dies; next in issue #3)

Captain Atom (last in Justice League Unlimited Vol. 2 #11; appears in Superman Vol. 6 #31 and flashback in Superman Vol. 6 #32 in between pages 28 and 40)

Etrigan (last in flashback in Superman Vol. 6 #32; also in a vision of a possible future)

Firestorm (last in Justice League: The Omega Act Special #1; in flashback in Superman Vol. 6 #32 in between pages 35 and 41)

Flash (Wally West; in flashback in between Justice League: The Omega Act Special #1 and flashback in Superman Vol. 6 #32)

Green Arrow (Oliver Queen; last in Justice League: The Omega Act Special #1; dies)

Green Lantern (Guy Gardner; last in Justice League: The Omega Act Special #1; in flashback in Superman Vol. 6 #32 in between pages 35 and 41)

Green Lantern (Hal Jordan; last in Justice League: The Omega Act Special #1; in flashback in Superman Vol. 6 #32 in between pages 15 and 25; dies)

Green Lantern (John Stewart; last in Justice League: The Omega Act Special #1; dies)

Harley Quinn (last in ???; in flashback in Superman Vol. 6 #32 in between pages 34 and 40)

Lobo (last in Superman Vol. 6 #31; in flashback in Superman Vol. 6 #32 in between pages 36 and 40)

Metamorpho (last in Justice League Unlimited Vol. 2 #11; in flashback in Superman Vol. 6 #32 in between pages 31 and 41)

Mister Terrific (in flashback in between Justice League: The Omega Act Special #1 and flashback in Superman Vol. 6 #31, and in flashback in between Titans Vol. 4 #27 and flashback page 19)

Plastic Man (last in Justice League: Dark Tomorrow Special #1; appears in Superman Vol. 6 #31 in between pages 31 and 33; in flashback in Superman Vol. 6 #32 in between pages 35 and 40)

Power Girl (last in flashback in Superman Vol. 6 #32)

Robin (Damian Wayne; last in Justice League: The Omega Act Special #1; also in a vision of a possible future)

Star Sapphire (last in Justice League Unlimited Vol. 2 #11; in flashback in Superman Vol. 6 #32 in between pages 28 and 40)

Supergirl (last in flashback in Superman Vol. 6 #31; in flashback in Superman Vol. 6 #32 in between pages 36 and 41)

Superman (Clark Kent; appears in Superman Vol. 6 #31 in between pages 32 and 33; also in flashback in between Justice League: The Omega Act Special #1 and flashback in Superman Vol. 6 #31, page 1, and in flashback in between flashback in Superman Vol. 6 #31, pages 12 and 13, and in flashback in between flashback in Superman Vol. 6 #31, page 14 and main story; also in a vision of a possible future)

Swamp Thing (last in Justice League: The Omega Act Special #1; appears in Superman Vol. 6 #31 in between pages 31 and 33 and in flashback in Superman Vol. 6 #32 in between pages 34 and 40)

Vixen (last in Birds of Prey Vol. 5 #24; in flashback in Superman Vol. 6 #32 in between pages 36 and 40)

Wonder Woman (also in flashback in between Justice League: The Omega Act Special #1 and flashback in Superman Vol. 6 #31, page 1, and in flashback in between Titans Vol. 4 #27 and main story; in flashback in Superman Vol. 6 #32 in between pages 36 and 41; also in a vision of a possible future)

Zatanna (last in flashback in Superman Vol. 6 #31; also in flashback in between Justice League: The Omega Act Special #1 and flashback in Superman Vol. 6 #31; in flashback in Superman Vol. 6 #32 in between pages 37 and 41; also in a vision of a possible future)

Justice Society of America

Flash (Jay Garrick; last in ???; appears in Superman Vol. 6 #31 in between pages 31 and 34, and in flashback in Superman Vol. 6 #32 in between pages 34 and 40)

Hawkman (last in flashback in Superman Vol. 6 #32)

Titans

Arsenal (in flashback in between Justice League: The Omega Act Special #1 and Titans Vol. 4 #28)

Cyborg (last in flashback in Titans Vol. 4 #28; also in flashback in between Titans Vol. 4 #27 and flashback in Titans Vol. 4 #28; in flashback in Superman Vol. 6 #32 in between pages 33 and 40)

Donna Troy (in flashback in between Justice League: The Omega Act Special #1 and flashback in Superman Vol. 6 #32, and in flashback in between Titans Vol. 4 #27 and #28)

Nightwing (in flashback in between Justice League: The Omega Act Special #1 and flashback in Superman Vol. 6 #32; also in a vision of a possible future)

Guest Star(s):

Quantum Quorum

Booster Gold (last in flashback in Superman Vol. 6 #31; also in flashback in between Justice League: The Omega Act Special #1 and flashback in Superman Vol. 6 #31)

Time Trapper (last in flashback in Superman Vol. 6 #31; also in flashback in between Justice League: The Omega Act Special #1 and flashback in Superman Vol. 6 #31)

World Forger (last in flashback in Superman Vol. 6 #31; also in flashback in between Justice League: The Omega Act Special #1 and flashback in Superman Vol. 6 #31)

Gorilla Grodd (last in flashback in Superman Vol. 6 #31; also in flashback in between Justice League Unlimited Vol. 2 #9 and flashback in Superman Vol. 6 #31; in flashback in Superman Vol. 6 #32 in between pages 15 and 34)

Supporting Character(s):

Lois Lane (in between flashbacks in Superman Vol. 6 #31; also in a vision of a possible future)

Mercy Graves (last in flashback in Superman Vol. 6 #31; next in Titans Vol. 4 #28)

Tim Drake (last in ???)

Villain(s):

Darkseid (behind the scenes; possesses Booster Gold)

Legion of Doom

Black Manta (last in ???; next in issue #3)

Cheetah (last in flashback in Superman Vol. 6 #32; in flashback in Superman Vol. 6 #32 in between pages 39 and 40)

Joker (last in ???; in flashback in Superman Vol. 6 #32 in between pages 20 and 37, and in flashback in Superman Vol. 6 #32 in between pages 39 and 40)

Lex Luthor (last in Superman Vol. 6 #30; next in flashback in Superman Vol. 6 #32, page 5)

Giganta (last in flashback in Superman Vol. 6 #32); in flashback in Superman Vol. 6 #32 in between pages 39 and 40)

Killer Croc (last in ???)

King Shark (last in ???; in flashback in Superman Vol. 6 #32 in between pages 21 and 38, and in flashback in Superman Vol. 6 #32 in between pages 39 and 40)

Mister Freeze (last in ???; next in flashback in Superman Vol. 6 #32)

Starro (last in ???; next in flashback in Superman Vol. 6 #32, page 6)

Omegademons (first appearance)

Guest Appearance(s):

Justice League Unlimited

Adam Strange (last in flashback in Superman Vol. 6 #31; also in a vision of a possible future; dies; next in issue #3)

Ambush Bug (last in ???; dies; next in issue #3)

The Captain (last in Justice League Unlimited Vol. 2 #9; dies)

Damage (last in Damage Vol. 2 #16; dies)

Detective Chimp (last in ???)

Green Arrow (last in flashback in Superman Vol. 6 #32)

Red Hood (last in ???; in flashback in Superman Vol. 6 #32 in between pages 34 and 40)

Robin (Damian Wayne; last in flashback in Superman Vol. 6 #32; also in a vision of a possible future)

Superman (Jon Kent; last in ???; next in Titans Vol. 4 #28)

Wonder Girl (Cassie Sandsmark; last in ???; next in Justice League Unlimited Vol. 2 #14)

Wonder Girl (Yara Flor; last in ???; next in DC K.O.: The Kids Are All Fight Special #1)

Aquaman (hook era; last in Justice League Unlimited Vol. 2 #9; next in Justice League Unlimited Vol. 2 #12)

Batman (Tim Drake; last in Justice League: Dark Tomorrow Special #1; next in Justice League Unlimited Vol. 2 #12)

Owlwoman of the 853rd century (last in Justice League Vol. 4 #34; next in Justice League Unlimited Vol. 2 #12)

Superman Blue (last in Justice League: Dark Tomorrow Special #1; next in Justice League Unlimited Vol. 2 #12)

Batman (Absolute Universe; last in ???)

Superman (Absolute Universe; last in ???)

Wonder Woman (Absolute Universe; last in ???)

Cameo Appearance(s):

Batgirl (Cassandra Cain; in a vision)

The Flash (in flashback)

Justice League Dark (in a vision)

Doctor Fate (in a vision)

John Constantine (in a vision)

Martian Manhunter (in a vision)

Raven (in a vision)

Amazons of Themyscira (in a vision)

Queen Hippolyta (mistakenly shown present in Themyscira)

Location(s):

Multiverse

Universe-0

Space Sector 2814

Earth-0

United States of America

Louisiana

Belle Reve

Gotham City

Arkham Tower

Robinson Park

Metropolis

Centennial Park

New York City

United Nations Building

Arctic Circle

Fortress of Solitude

Himalayas

Nanda Parbat

Skartaris

Themyscira

Justice League Watchtower II

Space Sector 0

Oa (only in a vision)

Rock of Eternity (only in a vision)

Heart of Apokolips (first appearance)

Absolute Universe

Comment(s):

Story continued from Justice League: The Omega Act Special #1 and continues in the next issue.

Cover M was a blind bag variant, each containing a cover not available outside of the polybag versions, as well as foil chase variants of the covers by Mark Spears (1:100), Javi Fernández (1:250), Jim Lee (1:500), and Greg Capullo (1:1000)

Solicitation:

The Heart of Apokolips has transformed Earth into a hellscape in preparation for the return of Darkseid! The end of the DC Universe is here! The Justice League's only chance to defeat Darkseid is to enter a deadly tournament, an epic and over-the-top battle royale that will surprise you! The World’s Greatest Heroes fight to become the champion to enter the ring against Darkseid, but there’s a catch...the closer you get to the Heart of Apokolips, the more it corrupts you, changes you into something dangerous. Which DC character has what it takes to make it to the end? Who is willing to do what it takes to win it all, even if it means taking down their friends and family? You want to get nuts? Let's get nuts

2 Additional Variant Covers