Finished: Doomsday Clock: Part 1 by Geoff Johns, Gary Frank and Brad Anderson (Ordinarily I'd film a quick review of Part 1 before moving on to part 2.  But in this case, I don't think there's any point.  Part 1 isn't a complete story, and has too many loose ends to risk giving a judgement just yet.  I think it's best to just read Part 2, see where this is all going, and then make my judgement.)