The DC Universe just made its first major DCEU retcon in Peacemaker season 2. The timeline of the DCEU became somewhat confusing in 2023 with the franchise's final four movies. James Gunn once insisted that The Flash would reset the timeline of the franchise, allowing his own plan, the DCU's Chapter One: Gods and Monsters, to come to fruition.

Battered and bloodied after just barely saving the world from an alien invasion, anti-hero Peacemaker (John Cena) and his surviving teammates are headed away from the battlefield to get medical treatment when the Justice League finally arrive, too late to help.

So, there still was a Justice League of America. Only some characters, specifically Wonder Woman, were no longer part of its early history. So when post- Crisis comics retold the formation and early years of the Justice League?