One of the few flaws the Injustice: Gods Among Us game was how poorly it represented most of its female characters. Wonder Woman in particular was horribly out of character, portrayed as having no reason for backing Superman's efforts at world domination other than her unrequited love for him. Harley Quinn suffered similarly, with her efforts at breaking free of The Joker coming about almost entirely because of Lex Luthor causing The Joker to admit that he had just been using her.
Injustice: Ground Zero #19 recreates this scene, but with a greater focus on Harley Quinn's emotional state and a more proactive role for Harley. The ultimate end is the same, but Christopher Sebela's script gives Harley more agency in how she breaks free of The Joker's control, showing that she was already looking for a way out when Lex Luthor showed up.
Jheremy Rappack's artwork is somewhat sloppy, loosing detail in the long range, However, his close-ups are to die for! I particularly like Raapack's designs for The Joker and Harley and the physiognomy of the characters from the fluidity of The Joker's movements to the stiff methodology of Lex Luthor. J. Nanjan's vivid colors finish the artwork nicely.