||Thundra; Akron; Weaponers of Qward; Crime Syndicate [Ultraman; Superwoman; Power Ring; Johnny Quick; Owlman]; Infinity; Grandmaster; Krona; Terminus;
the JLA [Martian Manhunter; Flash; Superman; Wonder Woman; Green Lantern; Batman; Aquaman; Atom]; Spectre [Hal Jordan];
Starro the Conqueror;
The Avengers [Jack of Hearts; Warbird; She-Hulk; Yellowjacket; Vision; Thor; Iron Man; Captain America; Triathlon; Wasp; Quicksilver; Scarlet Witch; Quasar; Hawkeye];
Cameos: Lobo; The Imperial Guard; Thanagarians; Skrulls; Mongul; the Brood; the Khunds; the Watcher; Dr. Doom; Magneto (an image on a tattered poster); Hulk; Punisher; denizens of Monster Island [Fin Fang Foom; Mole Man's Monster; Tricephalus; Vandoom's Creature]; Metron; Loophole; Captain Marvel; Supergirl; President Lex Luthor; Booster Gold (picture in an ad); 3 Flashes [Jay Garrick; Barry Allen; Wally West (as pictures in a newpaper)]; Impulse (a picture in a magazine)
||Twin universes become imperiled due a game being played by the Grandmaster and Krona. Their pawns: The Avengers and the JLA.
||Cameos of the various weapons that the heroes are gathering: The Bell, Jar, and Wheel; the Medusa Mask; the Spear of Destiny; the Eternity Book; the Orb of Ra; Green Lantern's power battery; the Soul Gems; the Casket of Ancient Winters; the Evil Eye; the Wand of Watoomb; the Ultimate Nullifier; the Cosmic Cube
||in JLA / Avengers: The Collector's Edition (DC / Marvel, 2004 series) #[nn]; in JLA / Avengers (DC, 2008 series) #[nn]