Multiversity: Harley Screws Up The DCU — DC Comics
Issue: #3
Harley Quinn…and that OTHER Harley Quinn, well, they got a problem. Somehow, someway, one of these Harley Quinns rode off in baby Kal-El’s lil’ rocket ship before he could leave Krypton way back whenever that was. She also, just MAYBE, distracted Barry Allen before that lightning bolt could hit, and don’t get me started about all the other heroes. So now the whoooole DC Universe is all screwed up...
Creators: Jimmy Palmiotti, Amanda Conner, Dan Brown, Tyler Kirkham, Frank Tieri, Alejandro Sanchez, Logan Faerber, Karl Mostert, Ferran Delgado
Characters: Harley Quinn, Poison Ivy, Catwoman, Superman, Golden Glider, Captain Cold, Jay Garrick, Jonathan Kent, Martha Kent, Mr. Freeze, Killer Croc, Heat Wave, Jesse Chambers, Jor-El, Lara Lor-Van, Weather Wizard, Barry Allen, Starro, Captain Boomerang, Lex Luthor