After weeks of speculation, rumors, and perhaps an accidental early reveal, DC has announced that the DC Universe will soon be split in two. This October, the 64-page DC All In Special #1 one-shot by Scott Snyder, Joshua Williamson, Daniel Sampere, and Wes Craig will close the book on the storyline that began back in 2022 with "Death of the Justice League". In its place, it will start a new chapter for the main DC Universe and an entirely new "Absolute Universe" to run alongside it.
DC's Absolute Universe is said to be a "reinvention" of the characters you know and love, separate from their counterparts in the main universe. Formed by "Darkseid energy" from his conflict with the Justice League in contrast with the main universe's "Superman energy", its heroes will be much more of underdogs, including a far more "primal" Batman. Both universes will still be connected by one colossal "mega-story" beginning with DC All In Special #1.

Starting off this universe is Absolute Batman by Scott Snyder and Nick Dragotta, Absolute Superman by Jason Aaron and Rafa Sandoval, and Absolute Wonder Woman by Kelly Thompson and Hayden Sherman. More series and creative teams should be announced in the coming months.
As for the main DC Universe, "All In" is meant to act as a fresh jumping on point for new readers (though emphatically not a reboot or retcon). October will see new creative teams for Action Comics, Detective Comics, Titans, Batman and Robin, Harley Quinn, Nightwing, and Catwoman, as well as new storylines beginning in Batman, Superman, Wonder Woman, Green Lantern, The Flash, and Poison Ivy. According to Snyder, every book will kick off new stories over the course of the Fall, including multiple brand new series soon to be announced.
DC All In Special #1 releases this October
