I was fifteen or so when it came out, and the buzz about it (in those Paleozoic, pre-internet days) was huge. I used to get my comics in the mail from a subscription service, and I still remember getting off the school bus, knowing the first issue was waiting for me, and running as fast and hard as I could to get home so I could read it. It didn't disappoint.
When I first read the series, this page--where Superman muses about what happened to the other Justice Leaguers--always kinda bugged me, because Aquaman is not mentioned, nor is he in the entire series*. Now, I realized that there was no plausible reason for Aquaman to be involved in this story at all, but of course the Aqua-Fan in me wondered what ol' Arthur thought about what had taken place with his former friends.
The obvious answer is that, like Diana and Hal, Arthur permanently abandoned humanity, surely retreating to the safe confines of Atlantis. The 1970s/80s Aquaman always had a particular chip on his shoulder, so if Frank Miller had bothered to map out what happened to the rest of the DCU during this series time frame, Atlantis was most likely his answer.
But I was curious--anyone else have any other ideas? Did Aquaman go anywhere else? Could he have? Let us know your thoughts...
(*Of course, I was perfectly happy Miller left Aquaman out of The Dark Knight Strikes Back)