Mike Sterling of Progressive Ruin points to John Byrne's nonsensical rantings about a supposed "glaring plot hole" in the Alan Moore/Dave Gibbons story from which Saturday's episode of Justice League Unlimited was adapted. The alleged hole is that, if the telepathic plant Mongul uses on Superman creates a simluation of his heart's desire, why is Superman's vision of a Krypton which never exploded and on which he's married to his lost love Lyla Lerrol such a dystopic one, where Jor-El is a discrecited crank and violent anti-Phantom Zone gangs assault Kara Zor-El?

But a quick look at the original story shows that the criticism is a pretty hollow one, for two reasons. First, we only start to see the "wrong" parts of Superman's vision after Batman, Robin, and Wonder Woman arrive at the Fortress of Solitude and discover an entranced Superman. It doesn't seem to be reading overmuch into the text to draw a connection between their efforts to free him and the decline of his imaginary Krypton. Second, Mongul tells Batman et al that the plant feeds its victims "a logical simulation of the happy ending they desire" (page 22 in the recent Alan Moore DC collection), which suggests that the fantasy world it presents is not simply ongoing wish fulfillment.

At any rate, this is more attention and effort than the matter deserves; read the discussion at Byrne's forum here if you're so inclined.