During Casey's run at Marvel Comics people started to recognize his talent as a writer, especially in regard to his work on the book Cable. He took the story in a different direction than had been previously established. Cable went from a multi-gun toting tough guy to a more spiritualized leader for the Askani.
Casey wrote many titles for Wildstorm comics, often to high critical acclaim, like the highly experimental Automatic Kafka with artist Ashley Wood. Casey took over Wildcats and gave the series new direction turning from standard superheroics to corporate espionage. His Mister Majestic series with artist Ed McGuiness impressed DC Comics enough to offer them a run on Adventures of Superman.
Casey wrote a limited series for Marvel Comics, a sequel to 2005's Avenger's: Earth's Mightiest Heroes. He also wrote the series G.I. Joe: America's Elite for Devil's Due Publishing and Gødland for Image Comics. He is also wrote a revamp of the original Youngblood miniseries by Rob Liefeld, called Maximum Youngblood. Recently, as well, as discussing the ending of Gødland and the new Charlatan Ball and Nixon's Pals, he mentioned that Codeflesh would be returning.
Currently, he, along with the rest of Man of Action, were one of the executive producers of the Ben 10 reboot.
Episodes Written by Him
- Omni-Tricked: Part 1 (with other Man of Action)
- Omni-Tricked: Part 2 (with other Man of Action)
- Omni-Tricked: Part 3 (with other Man of Action)
- Omni-Tricked: Part 4 (with other Man of Action)
- Out to Launch
- Vote Zombozo
- High Stress Express
- Drone On
- Bomzobo Lives
- That's The Stuff (story)
- Xingo's Back
- Super-Villain Team-Up (story)
- This One Goes to 11 (story)
- Ben 10 Versus the Universe: The Movie (show runner and story editor)
- Ben 10-Generator Rex: Heroes United (with other Man of Action)
- The "Casey-Kelly Accords" are named after him and Joe Kelly.
|Ben 10||Adam Beechen • Amy Wolfram • Duncan Rouleau • Eugene Son • Greg Klein • Greg Weisman • James Phillips • Jeff Hare • Joe Casey • Joe Kelly • Kevin Hopps • Man of Action • Marsha F. Griffin • Marty Isenberg • Michael Jelenic • Sean Jera • Steven T. Seagle • Tom Pugsley|
|Ben 10: Alien Force||Adam Beechen • Amy Wolfram • Bob Goodman • Charlotte Fullerton • Dwayne McDuffie • Eugene Son • Jake Black • Jim Krieg • Len Uhley • Len Wein • Marty Isenberg • Matt Wayne • Nicole Dubuc • Peter David • Rich Fogel • Robert Hoegee • Stan Berkowitz|
|Ben 10: Ultimate Alien||Adam Beechen • Brian Swenlin • Charlotte Fullerton • David McDermott • Don McGregor • Dwayne McDuffie • Ernie Altbacker • Eugene Son • Geoffrey Thorne • Jim Krieg • J.M. DeMatteis • Kevin Grevioux • Len Uhley • Len Wein • Marty Isenberg • Matt Wayne • Peter David • Stan Berkowitz • Steven Barnes|
|Ben 10: Omniverse||Amy Keating Rogers • Amy Wolfram • Charlotte Fullerton • David McDermott • Dani Michaeli • Dean Stefan • Eric Wallace • Eugene Son • Geoffrey Thorne • Joelle Sellner • Jonathan Callan • Kevin Rubio • Len Uhley • Len Wein • Marty Isenberg • Matt Wayne • Matt Youngberg • Michael Ryan • Richard Pursel • Robert Hoegee • Stan Berkowitz • Tom Minton • Tom Pugsley • Yuri Lowenthal|
|Ben 10 (Reboot)||Anthony J. Marchisello • Adam Pica • Chris Wyatt • Chuck Kim • Dan Marmor • Duncan Rouleau • Ed Valentine • Emiliano Bolado • Evan Dorkin • Herny J. Stukenborg • James Felder • Jason Adam Katzenstein • Jeff Treppel • Joe Casey • Joe Kelly • John O'Bryan • John Sazaklis • Johnathan Browning • Jonathan Callan • Julien Magnat • Justin Peniston • Kelly Turnbull • Kevin Almeida • Kevin Burke • Lawrence H. Levy • Man of Action • Matt Nix • Michael Allred • Michael Olivier • Samantha Charlip • Sarah Dyer • Seyha Klam • Shannon Denton • Steven T. Seagle • Tom Pinchuk • Zander Cannon|