So, one of the cool things about DC comics is that every once in a while they will give you a round-about figure of just how much time in the "comic book world" has passed. this timeline is obviously much more slow-moving than the real world.
In 1986, "Man of Steel" made it clear that the current comics took place six years after Superman's debut. As most of the Silver-Age superheroes were supposed to have debuted right around the same time (Year One), we can say the the Crisis and the immediate aftermath, like Wonder Woman's new debut, all happened in "Year Six."
Then, when Zero Hour came out, it actually included a timeline at the end. This reinforced that the Crisis took place in Year Six, and essentially stated that the Death and Return of Superman, Knightfall, Emerald Twilight, and Zero Hour all took place around Year 10.
Then something very interesting happened. In "Identity Crisis," it actually states that Ralph and Sue Dibney have been married for over twenty years. It clearly shows they met and were married sometime after the debut of both Elongated Man and The Flash. Woah. So Brad Meltzer was actually trying to say we were now past Year 20, which would essentially state that everything since Zero Hour happened in not too far outside of real-time. It would also mean most of our favorite heroes were pushing 50.
But that decision seems to have been contradicted in the pages of Green Lantern Vol. 04. In the first story arc, "No Fear," which I recently just re- read, it essentially says, through exposition, that it has been thirteen years since Green Lantern's debut, which would place these events only three years after Emerald Twilight and Zero Hour.
So what's the deal? Now obviously, I think the 13-year version is the one to go with. But why did they let Meltzer say over 20? I mean, I personally think it would be cool to have all the characters aging. But I think most people would be adverse the idea of the modern Superman being 50. But hey, maybe we can say it was Infinite Crisis that changed it! So the event sof Infinite Crisis changed the timeline so that all the events that happened over the course of 10+ years were smooshed into 3.
But of course, as each "Crisis" changed so much, there's no guarantee that the post-Infinite Crisis timeline matches up at all with the one presented in Zero hour. But for sanity's sake, I think we're meant to assume it's about the same, except where otherwise noted.
Has anyone heard about the ideas behind Melltzer's decision?