Countdown to Final Crisis is a limited series (51 issues) that follows 52. The series will take you to every corner of the DC Universe and Multiverse and will act as the spine of the DCU, with every major event and character spinning in and out of the story at some point. Like 52, Countdown is set to come out weekly, but unlike 52, each issue does not necessarily correspond to one week. Instead, every four issues cover a month of time. As the name suggests the issues of Countdown will be a countdown, going from 51 to 1.