| Issue | #21 |
| Published | January 2008 |
| Cover Price | 2.99 USD; 3.65 CAD |
| Pages | 36 |
| Editing | Joan Hilty; Rachel Gluckstern (associate) |
| Characters | Spectre [Crispus Allen]; Blue Beetle [Jaime Reyes] |
| Genre | Superhero |
| Pencils | Rafael Albuquerque (signed) |
| Inks | Rafael Albuquerque (signed) |
| Colors | Cris Peter (signed) |
| Characters | Blue Beetle [Jaime Reyes]; Spectre [Crispus Allen]; Paco; Traci Thirteen; Alberto Reyes; VILLAIN: Luis |
| Synopsis | Jaime Reyes gets a shot at punishing the man who crippled his father - only to discover he's in line behind the Spectre, making for one of the young hero's hardest choices yet! [per solicitation] |
| Genre | Superhero |
| Script | Justin Peniston |
| Pencils | Andy Kuhn |
| Inks | Andy Kuhn |
| Colors | Guy Major |
| Letters | Pat Brosseau |
| Characters | Batman |
| Script | Dan Didio |
| Pencils | Andy Kubert |
| Inks | Andy Kubert |
| Colors | Pete Carlsson |
| Letters | typeset |
| Notes | Dan Didio discusses COUNTDOWN: ARENA and breaks down 26 of the 52 Earths. Hot list - COUNTDOWN PRESENTS: THE SEARCH FOR RAY PALMER: RED RAIN #1, GREEN LANTERN #25 and TALES OF THE SINESTRO CORPS: ION #1. House ad for BLUE BEETLE #22. |