`` The Oz Effect '' and `` Superman Reborn '' are related to `` The Button '' in DC 's Rebirth campaign .
``  Doomsday Clock is part of the DC Rebirth campaign and continues the narrative that was established with 2016 's one-shot issue DC Universe : Rebirth Special # 1 , 2017 's crossover event `` '' The Button , '' '' and other related stories such as Action Comics ' `` '' The Oz effect '' '' and `` '' Superman Reborn '' '' story arcs . ''
Doomsday Clock -LRB-comics-RRB-