This is the chapter of Doomsday Clock we’ve been waiting for. Issue #10 addresses many of the most burning questions fans have been asking since DC Universe Rebirth #1 first revealed Doctor Manhattan as the secret hand altering time itself. Why did Manhattan come to the DC Universe? What has he been doing all this time? What is his ultimate goal? We finally get concrete answers to those questions. And in the process, this issue redefines the very nature of the DC multiverse while setting the stage for the long-awaited showdown between two metahuman titans.
Doomsday Clock had hit a bit of a slump in recent issues, in large part because the focus had shifted from the refugees of the Watchmen universe to DC’s heroes. This story loses some of its weight and significance when it becomes too heavily mired in current DC continuity and loses that fish out of water element. Fortunately, that isn’t a problem this time around. This issue is presented solely from the perspective of Doctor Manhattan, as writer Geoff Johns and artist Gary Frank provide a complete (albeit suitably nonlinear) account of the character’s post-Watchmen life.
Source: IGN.com Doomsday Clock Delivers the Answers We Crave