I like how you completely dismiss the idea that Doomsday Clock has any value as a story on its own merits. that's mostly not sarcasm, I agree that it's not a good comic, but hey, at least it's a weirder, more ambitious, and more interesting failure than anything I would have expected to spin out of DCU Rebirth #1.Doomsday Clock has been inconsequential since Dan Didio decided he didn't give a fuck about what Geoff Johns was doing. Like, literally the only reason this story mattered was to bring back the Justice Society, the 90's heroes, and the Legion of Super-Heroes. Bendis is bringing back the Legion and Young Justice (Connor Hawke BTFO apparently), and Tynion/Snyder are bringing back the Justice Society. There's literally no purpose to DC other than to finish it to say they did.
At best, maybe when 12 comes out they could use it as an excuse to refresh the line.
anyway, there'll probably be one or two Doomsday Clock Aftermath projects announced at SDCC, like a book about New Rorschach's adventures in the DCU or something, but it'll otherwise stay irrelevant to the rest of the DC line. I'd love to know what the original plan was for how it was supposed to impact the broader DCU, but to be honest, I suspect that everyone involved had only a vague idea when the book started.