The alternate universe of the Injustice comics has slowly become one of the most beloved DC stories, a world that explores the after-effects of The Joker dying at Superman's hand after Killing Lois Lane and her and Superman's unborn child.
In a fantasy sequence depicts Batman taking the Joker's life as opposed to Superman, this panel was a shocking reminder of the invisible line between heroism and vigilantism that has defined Batman since his very first appearance.
