Doomsday ClockDoomsday Clock.

Doomsday Clock is a 2017 to 2019 superhero comic book limited series published by DC Comics, written by Geoff Johns with art by penciller Gary Frank and colorist Brad Anderson. The series concludes a tangential story established in the New 52 and DC Rebirth, and it is a sequel to the 1986 to 1987 graphic novel Watchmen by Alan Moore, Dave Gibbons and John Higgins, making it the first official crossover between Watchmen and the mainstream DC Universe. At the time, DC co-publisher Dan DiDio promoted Doomsday Clock as an official "sequel" to Watchmen.