| Release: | May 20, 2009 |
| Cover: | Jul 2009 |
Mash Up, Part 1
| Release: | May 20, 2009 |
| Cover: | Jul 2009 |
Superman and Batman find themselves in a very unusual world, where everyone they know has been merged into combination individuals. Before they can figure out exactly how that happened, they are called upon to help the Justice Titans deal with Doomstroke's latest rampage.
| Writer | Michael Green, Mike Johnson |
| Artist | Francis Manapul |
| Colorist | Brian Buccellato |
| Letterer | Rob Leigh |
| Editor | Eddie Berganza, Adam Schlagman |
| Batman | Bruce Wayne |
| Superman | Kal-El / Clark Kent |
| Lex Joker | |
| Doomstroke | Slade |
| Terranado | Terra Mark V |
| Donna Wonder | Diana Troy |
| Flash | Wally Allen |
| Night Lantern | Hal Grayson |
| Hawkbeast | Gar Katar |
| Aquaborg | Art Stone |
| Star Canary |
| Age | Modern Age |
|---|---|
| Format | Comic |
| Series Group | Superman / Batman |
| Genre | Action | Super-Heroes |
| No. of Pages | 32 |
| Country | USA |
| Language | English |