A JSA series written by Scott Snyder will be set at the beginning of the 1st Gen:
“I've been hinting at it, but I'm looking to write the JSA after this,” Snyder says. “After Justice League, there'll be a bit of a window, like a break between what we're doing on Justice League and when they come back for their own series, because of other things we're introducing. That said, the period in which I'd like to write them is this period. That's why we chose 1939, 1940. We always see them as representatives of a time that's passed where they're viewed with a kind of nostalgia for when things were black and white in terms of morality. What I want to do is really revisit their early years, show the formation of the team.”
Perhaps coincidentally, it was revealed at New York Comic Con that there will finally be a comprehensive timeline of DC Universe continuity coming in the near future. That timeline breaks DC history up into “generations” and the JSA would be near the very start of DC’s first heroic age. Snyder hints that the origin of the JSA will include some new elements that have never before been revealed. “They might have also been gathered together by somebody surprising,” Snyder says. While he didn’t elaborate, one of the key pieces of the new DC Universe timeline is that Wonder Woman’s arrival in the United States is what kicks off the first age of DC superheroes.
It’s worth noting that there has never been a comprehensive story about the earliest days of the JSA, and the story of their formation hasn’t even been told since Secret Origins #31 by Roy Thomas and Michael Bair in 1988. Snyder hopes to explore the team’s origin in a new way.
“Show some of the early members' conflicts, show how, at that moment when they were brought together, things were anything but black and white,” Snyder says. “Of course, evil's rising overseas and there's no question about the nature of that darkness, but in terms of the future and how it was written and whether or not good would win or whether or not we would jump into the war as a country, all of that stuff was fraught with conflict and arguments and ambiguity and anxieties. I want to write them raw and brutal and young, when they're not the elder statesmen, when they don't know any better than anybody else [and] when they're actually like young people caught up as the first superhero team in history at a moment of tremendous stakes and confusion. That's why I think introducing them in this way [in Justice League] is fun, because it's a teaser of some of this stuff we plan on doing with them later down the line as well.”
Full article: https://www.denofgeek.com/us/books/d...ca-dc-universe