Superman and Batman: World's Funnest — DC Comics
Issue: #1
In the Elseworld series. What happens when two higher dimensional entities battle? Hilarity and wackiness in differing DC timelines and involving just about everybody, of course.
Creators: Tom Orzechowski, Sheldon Moldoff, Mike Allred, Brian Bolland, Doug Mahnke, Stephen DeStefano, Dave Gibbons, Frank Miller, Alex Ross, Bruce Timm, David Mazzucchelli, Norm Rapmund, Phil Jimenez, Stuart Immonen, Jim Woodring, Evan Dorkin, Joe Giella, Ty Templeton, Jay Stephens, Scott Shaw
Characters: Batman, Dick Grayson, Superman, Joker, Firefly, Huntress (Bertinelli), Jade, Obsidian, Peacemaker, Guy Gardner, Martian Manhunter, Ace the Bat-Hound, Hawkman, Lois Lane, Mr. Mxyzptlk, Zatanna, Hal Jordan, Etrigan, Granny Goodness, Mr. Miracle