DC has set Batman: Earth One Vol. 3 for a June 8, 2021 release. The published has also revealed the synopsis/solicit text and cover of the OGN.
"Harvey Dent is dead. Or is he? A gang of thieves thrusts Gotham City into a state of fear when they are mysteriously well-armed with military-grade weapons: flamethrowers, grenade launchers, and even tanks," reads the Amazon synopsis for the OGN. "And this gang claims it is funded by none other than former district attorney Harvey Dent."
"Balancing his two lives, Bruce Wayne must find the truth by tapping his growing network of agents, including Alfred Pennyworth, Jim Gordon, Waylon 'Killer Croc' Jones, and the savvy new Catwoman," the synopsis continues. "Bruce is distracted by the seemingly impossible return of another figure believed dead: his grandfather Adrian Arkham. He must also comfort his longtime friend, Gotham City mayor Jessica Dent, who is scarred both physically and mentally from her experience with the Riddler, which resulted in the gruesome death of her brother."