Justice League International
- Justice League #1-60 (plot & breakdowns) (pencils in #8-10 as backups, #13 full issue)
- Justice League Adventures #32. (DC) (writer)
- Justice League Annuals #1, 2, 3, 4, 5 (plot & breakdowns) (pinups in #3)
- Justice League Europe #1-35 (plot & breakdowns)
- Justice League Europe Annual #1, 2 (plot & breakdowns) (part pencils in #2)
- Justice League International Special #1 (plot & breakdowns)
- Justice League Quarterly #1, 2, 3 (plot & breakdowns)
- Formerly Know as the Justice League #1-6 (Plot)
- JLA Classified: I Can't Believe It's Not the Justice League #4 - 9 mini series (Writer)
- Justice League Unlimited #43 (Writer)
- DC Retroactive: Justice League Of America - The '90s #1 (DC) Aug 2011- Writer
- Justice League: Generation Lost #1...6 (Co-writer/Breakdowns)
- Justice League 3000 #1..15 (2013) Plot
Keith Giffen, JM DeMatteis and Kevin Maguire had been set to reunite fall 2013 for an ongoing series chronicling future renditions of the DCU's big guns, then suddenly Maguire was let go and the title got pushed back by a month. According to Keithif I had to describe the Justice League 3000 book, I'd say it's the closest we've come to doing a Simon Pegg movie
andThey're Not Clones!
- Justice League 3001 #1..12 (2015) - Writer
this Justice League is one of the many, many, many, many varied earths - we're not even putting a number to it; it's out there somewhere - we can have the character come in and do what we wants. You know, if it's not "New 52"'s Earth, we get to pick and choose the things we like about the character and put the character in there
.