Beginning an all-new SUPERGIRL arc! The War of the Supermen is over. Who is left to pick up the pieces? Fallout from her actions during the war plague Supergirl, and Kara has to make one of the toughest decisions of her life: Should she continue to be Supergirl and stay in metropolis – or is it time to move on? And with Cat Grant and the villainous coming at her harder than ever before, is being a superhero even worth it? "Who is Supergirl?" begins here!