Batman #423 CGC 9.9 Fan Expo Special Foil Edition B is a single issue comic book published by DC Comics in 2023. The comic book features the characters Joker and Batman (Bruce Wayne) in the DC Universe. The comic book is graded 9.9 Mint by Certified Guaranty Company (CGC) and is a special edition with a foil cover. The comic book is written by Marc Silvestri, Todd McFarlane, and Jim Starlin. The comic book belongs to the Modern Age (1992-Now) era and is part of the Batman series title.