According to the DC solicit:
Join visionary writer Grant Morrison, today’s most talented artists, and a cast of unforgettable characters from 52 alternative Earths of the known DC Multiverse! Prepare to meet the Vampire League of Earth-43, the Justice Riders of Earth-18, Superdemon, Doc Fate, the super-sons of Superman and Batman, the rampaging Retaliators of Earth-8, the Atomic Knights of Justice, Dino-Cop, Sister Miracle, Lady Quark, the legion of Sivanas, the Nazi New Reichsmen of Earth-10 and the latest, greatest Super Hero of Earth-Prime: YOU!Comprising six complete adventures – each set in a different parallel universe – plus a two-part framing story and a comprehensive guidebook to the many worlds of the Multiverse, THE MULTIVERSITY is more than just a multipart comic-book series. It’s a cosmos spanning, soul-shaking experience that puts YOU on the frontline in the Battle for All Creation against the demonic destroyers known as the Gentry!In issue #1, pencilled by superstar artist Ivan Reis (AQUAMAN, JUSTICE LEAGUE), President Superman of Earth-23 uncovers a threat to all Reality so apocalyptic it will take a team of incredible heroes from across the Multiverse to face it – including Captain Carrot, like you’ve never seen him before!But even with a multitude of alternate worlds to choose from, where every variation is possible, can anyone hope to prevail against the onslaught of ultimate evil and undying hatred – in the unstoppable form of a one-time cosmic defender with unimaginable powers?! Join us, if you dare, for the beginning of THE MULTIVERSITY !
As teased above a new type of multiversal Justice League forms to battle the oncoming threat. It has also been revealed that other members include a gay male Flash analogue called Red Racer, a gender-swapped Aquaman, and a storm god based on Australian aboriginal mythology called Thunderer.
Update August 15: updated with variant covers courtesy of Comics Continuum.
1:10 B&W Variant Cover by: Ivan Reis
1:25 Captain Carrot Variant Cover by: Chris Burnham