Originally Posted by
Dataweaver
This is basically my approach as well. In particular, I see the Robins as the thorniest problem, because kids have this nasty tendency to grow up. If you can work out a timeline that makes sense for Dick, Jason, Tim, and Damian, then you can attach publication dates to it and have nearly everything else align to that. Jon Kent is the single biggest issue to deal with there, in that inserting a decade into the timeline to let him grow up naturally throws things out of whack for everyone else. My preferred solution is to reinstate something close to his original history: sometime around the point that Flashpoint happened, Lois and Clark went missing; more recently, around the time of Superman Reborn, they returned with a nine-year-old son and a story about having been stuck on another world (Earth 52) for a decade, until that world's Superman helped bring them home. My “backup option” is to move the marriage of Lois and Clark and Jon's birth to an earlier point in Superman's career, but out of order with everything else: so instead of Lois being Clark's fiancee when Doomsday strikes, she's already his wife and Jon's mother. But I must repeat, that's my second choice; my first choice does no damage to the chain of events, and is in fact a demonstration of Ascended's principle of sticking with the original idea.
As for the JSA, I've come up with a solution for them which I think works very nicely, and aligns with what Johns is doing in The New Golden Age: restore most of the JSA's pre-Crisis history as events that happened in the 20th century, from 1940–1985; and apply most of the post-Crisis retcons to this period (e.g., no 20th century Superman or Batman, and the addition of the Young All-Stars to the timeline). This works because Roy Thomas was treating the JSA timeline that he was developing in the late 70s/early 80s as if Earth 2 was operating on real-time; and he was introducing “fixes” such as Ian Karkull to explain how the JSA was still relatively young by the then-modern end of the timeline. Keep those elements in play, and you can say that in the 20th century, publication dates and In-universe dates are one and the same, right up to the Crisis on Infinite Earths.
And that's the other part of my proposed fix: instead of Earth One and Earth Two having a series of crossovers starting with the Flash of Two Worlds and ending with the Crisis on Infinite Earths, recast those events as time travel crossovers between the 20th century and the 21st century; and where the Crisis on Infinite Earths originally ended with multiple Earth's combined into one, have this recasting of it end with characters from the 20th century relocated to the 21st century. So Infinity Inc debuted in 1984; but a year later, they were transported to the 21st century and completed their run there. That's why Jade and Obsidian, for example, are pushing 30 instead of being in their mid-50s; and as the 21st century timeline continues to slide forward, they'll remain in their early 30s for awhile instead of pushing into retirement age in a decade, which is what would happen without the CoIE-induced time skip.
Other issues to address:
• How much of the Bronze Age happened? In particular, Superman: was there ever a time when the Daily Planet was bought out by WGBS and Clark became a TV Anchor? But there's also some Batman history that got lost, namely Jason Todd's pre-Crisis history. I'm not just talking about the rewrite or his origin story; by the time of the Crisis on Infinite Earths, Jason Todd was on the verge of being adopted by a reformed criminal named Nocturna. Did any of that actually happen? Likewise with Wonder Woman: were there any “Diana Prince years”, when Wonder Woman was depowered and retired the Wonder Woman costume but became a sort of “private secret agent” for a time?
• post-Crisis reboots. In particular, there were retcons to Wonder Woman and Hawkman that had them debuting after the Crisis; with Hawkman, his arrival was pushed so far forward in time that they actually had to come up with an explanation for the Hawkman who had been serving with the JLI for several years of publication. Wonder Woman's situation wasn't quite as severe; but it still leaves some question about how to line up her post-Crisis history with the new status of her debuting way back in 1939.
• Flashpoint. We now have Earth 52 as a world where the New 52 happened more or less as published; I take advantage of this fact in my preferred solution to Jon's early life. But what happened on Earth 0 between Flashpoint and Superman Reborn, if not the New 52? The status quo changed considerably between those two points, sometimes in ways that defy “natural progression” explanations, such as Tim Drake's age. Some of the New 52 events in this time period happened; but not necessarily all of them: I would have no problem whatsoever leaving all of Lobdell's Teen Titans stuff strictly on Earth 52, for instance. I'd also be inclined to leave Batman's Zero Year there, along with all of the revisions to the Robin backstories that were introduced there. Just as a few examples. But somehow, we went from Tim running around as the 19-year-old Red Robin who had been crucial to the Return of Bruce Wayne and who had earned Ra's al-Ghul's respect and enmity to him as Batman's 16(?)-year-old “second in command” of the Gotham Knights, who was getting ready to head off to college early. Basically, you should look at each hero as they were just before Flashpoint vs. how they were about a year into Rebirth, and ask how much of the intervening history still makes sense — and for that history that doesn't, ask what replaced it. In some of the more extreme cases, some of the pre-Flashpoint history might be gone: while I don't like the idea, it's possible to resolve the oddities with Tim's age by saying that his pre-Flashpoint career as Red Robin never happened.
Basically, Crisis on Infinite Earths and Flashpoint both introduced some discontinuities that need to be addressed. There are also a few examples of events that have been retold several times, such as the first clash between the JLA and the CSA: as far as I know, we have no less than four “first encounters” between the two: Crisis on Earth 3, JLA Earth 2, Forever Evil, and (I think) Battle for Earth 3. Which one is in continuity, and when did it happen?