 This, along with Dominguez's own appreciation of the Silver Age of Comics, inspired the creation of a predecessor to the modern-day El Gato Negro.This character is now known as Agustin Guerrero, a former luchador-turned-adventurer of the late '50s and '60s.The Francisco Guerrero incarnation of El Gato Negro became a popular character soon after his introduction, the first printing of the series actually sold-out within two months.