Terminator and Watchmen also share in themes of false flag attacks being used as justification for rising fascism; Skynet uses the opportunity provided by human war to take over the United States’ military assets, Ozymandias uses a manufactured alien invasion as justification for bringing about his New World Order… the two stories are actually contemporary, Terminator even predating Watchmen by two years, so they no doubt draw on the same Cold War paranoia
compare and contrast: Alternia as the Ur-Postapocalypse where every possible thing has gone wrong (authoritarian future government overlays machine uprising overlays plagues of the undead), Lord English as an entity who can only enter a universe once it has been destroyed from the inside