| Issue | #12 |
| Published | June 2008 |
| Cover Price | 2.99 USD; 2.99 CAD |
| Pages | 36 |
| Editing | Joey Cavalieri; Stephanie Buscema (assistant) |
| Characters | Challengers of the Unknown [Ace Morgan; Prof Haley; Red Ryan; Rocky Davis]; June Robbins; Firestorm [Jason Rusch]; Flash [Wally West]; Green Lantern [Hal Jordan]; Metamorpho [Rex Mason]; Supergirl [Kara Zor-El]; Superman [Clark Kent; Kal-El]; Ultraman [Clark Kent] (Earth-3); Wonder Woman [Diana Prince] |
| Genre | Superhero |
| Pencils | George Perez (signed) |
| Inks | George Perez (signed) |
| Colors | Tom Smith (signed) |
| Characters | Challengers of the Unknown [Ace Morgan; Prof Haley; Red Ryan; Rocky Davis]; June Robbins; Firestorm [Jason Rusch]; Flash [Wally West]; Green Lantern [Hal Jordan]; Metamorpho [Rex Mason]; Power Girl; Supergirl [Kara Zor-El]; Superman [Clark Kent; Kal-El]; Teen Titans [Blue Beetle [Jaime Reyes]; Kid Devil [Eddie Bloomberg]; Miss Martian; Ravager [Rose Wilson]; Robin [Tim Drake]; Wonder Girl [Cassandra Cassmark]]; Ultraman [Clark Kent] (Earth-3); Wonder Woman [Diana Prince]; Destiny; Megistus (villain) |
| Synopsis | It's all been leading up to this: Half of the DC Universe vs. Megistus! Superman, Supergirl, Green Lantern, Flash and a host of others fight to stop the alchemist pulling the strings since the beginning of the series. But will the combined powers of these heroes be enough to stop what has already begun? [per solicitation] |
| Genre | Superhero |
| Script | Mark Waid |
| Pencils | Jerry Ordway |
| Inks | Bob Wiacek |
| Colors | Tom Smith |
| Letters | Rob Leigh |
| Characters | Batman [Bruce Wayne]; Joker |
| Script | Mike Carlin |
| Letters | typeset |
| Notes | Mike Carlin talks about the next few arcs coming up in BATMAN CONFIDENTIAL. Hot list - COUNTDOWN #2, GOTHAM UNDERGROUND #7 and ROBIN #173. House ad for THE BRAVE AND THE BOLD #13. |