Originally Posted by
Rikdad
A few notes while I ponder a longer blog post, and responding, also, to MrBlondey's great questions:
Superficially, it looks like Dr. Manhattan took the JSA out of continuity. But, I think you're right – he may have incidentally set into motion the chain of events ending with the JSA leaving continuity, but we have no indication that he took them all out, with Alan Scott only one example.
Here's an obscure detail: Dr. Manhattan mentions that Alan Scott appeared before HUAC on January 8, 1950. This is NOT the event that many people may be thinking of. According to older stories, the JSA appeared before HUAC on October 13, 1951. According to, at least, The Golden Age, Alan Scott appeared in his civilian identity before HUAC on January 8, 1950. So, if that mention is significant (and it certainly seems so), Dr. Manhattan's beef with Alan Scott seems to pertain to the man himself, not with Green Lantern. Granted, these are events we still haven't seen in detail, so there may be more crucial details coming.
There are some other intriguing details that I'll post very shortly.
As a bit of mere supposition, I caught myself assuming that the blue blast at the end of issue 9 was Dr. Manhattan knocking out the superheroes with a blast of energy. Maybe, but this is exactly what was staged, also, at the end of issue 8! I think there's an excellent chance that Veidt (using Bubastis II) created both blasts to create three (or four) different frame jobs! First, to make Firestorm and Superman look bad in the eyes of the world, then to set the DC superheroes upon Dr. Manhattan, and now, finally, to make Superman, when he wakes up, engage in battle with Dr. Manhattan.