The first 2023 issue of Shogakukan 's Weekly Shonen Sunday revealed that the 26th film in the Detective Conan is titled Detective Conan: Kurogane no Submarine (Iron Submarine).
Furthermore, the following image has been made public:
The film will premiere in Japan on April 14, 2023. The film's tagline is: "Don't die, Haibara.".
Yuzuru Tachikawa (Mob Psycho 100, Blue Giant, Case Closed: Zero the Enforcer, Death Parade) is directing the film, and Takeharu Sakurai (six other Detective Conan films, including Detective Conan: The Scarlet Bullet) is writing the screenplay. Yugo Kanno (Detective Conan: The Bride of Halloween, Psycho-Pass, JoJo's Bizarre Adventure: Stardust Crusaders) is composing the music.
Source: ANN