Gotham City Sirens: Union — DC Comics
Issue: #1
Catwoman, Poison Ivy and Harley Quinn have a new agenda in this hardcover collecting GOTHAM CITY SIRENS #1-7. The three villains are tired of playing by other people's rules - now they're planning on striking out in their own unique way.
Creators: Janelle Asselin (Siegel), Mike Marts, Guillem March, Tomeu Morey, Eddie Berganza, Steve Wands, David López, Paul Dini, Rob Leigh, Rob Hunter, Travis Lanham, Adam Schlagman, J.G. Jones, Peter Pantazis, Alvaro Lopez, José Villarrubia, Marc Andreyko
Characters: Batman, Alfred Pennyworth, Dick Grayson, Superman, Poison Ivy, Catwoman, Harley Quinn, Nick Quinzel, Sharon Quinzel, Barry Quinzel, Jenna Duffy, Damian Wayne, Riddler, Black Mask, Jason Todd, Zatanna, Talia al Ghul, Plastic Man, Red Tornado, Huntress (Wayne)