Title from cover. "Paul Dini, with Adam Beechan... [et al.], writers ; Keith Giffen, story consultant ; Ron Lim ... [et al.], pencillers ; Jimmy Palmiotti ... [et al.], inkers ; Travis Lanham... [et al.], letterers ; Pete Pantazis, Tom Chu, colorists."--P. [2] "Originally published in single magazine form as Countdown 25-13, c2007 DC Comics."--P. [4].