Injustice: Gods Among Us #15

There's a standoff in the halls of Arkham Asylum, as Superman attempts to whisk its inmates to a more secure prison and Batman tries to stop him. Robin joins with Superman, Harley Quinn shows up at the wrong time and a very imposing inmate is turned loose.

Characters: Batman, Calendar Man, Cyborg, Damian Wayne, Dick Grayson, Flash (Barry Allen), Green Arrow, Harley Quinn, Killer Croc, Mad Hatter, Riddler, Solomon Grundy, Superman, Two-Face, Victor Zsasz, Wonder Woman