Premise: "The Button" is a 2017 comic book crossover created and published by DC Comics. The story arc consists of four issues from DC's Batman and Flash publications, functioning in part as a larger buildup towards the "Doomsday Clock" event. The plot was written by Joshua Williamson and Tom King, with art by Jason Fabok and Howard Porter.
Hypothesis: The Doomsday Clock event took place in a comic in 2017