At a DC press event at San Diego Comic-Con, DC writer Tom King revealed new details on his upcoming event with artists Clay Mann and Mitch Gerads, Heroes in Crisis. When DC uses “crisis” in a title, it’s typically a signal that the story will feature epic stakes as the fate of the multiverse hangs in jeopardy, but this time around, it’s a much more grounded and personal story. Heroes in Crisis will introduce a new location in the DC Universe called Sanctuary, a technologically advanced therapy center for superheroes to give them the help they need need after enduring physical and psychological trauma on a day-to-day basis, but things take a grim turn when a dozen superheroes are massacred in a shooting inside Sanctuary. The first question is, who is the mysterious shooter? The second, how will the heroes put it all back together?
Source: IGN.com DC's Heroes in Crisis Is Caused by a Superhero Shooting