Along with many other postponements, April saw the announcement of a delay for the latest Detective Conan movie, Detective Conan: The Scarlet Bullet. At the time it was postponed from its April 17, 2020 date indefinitely due to COVID-19 concerns, but now it finally has a new window lined up for its premiere.
While it’s definitely an extended wait, Conan fans in Japan can look forward to the film opening over there in April of 2021.
— 劇場版名探偵コナン【公式】 (@conan_movie) June 8, 2020
Source: Comic Natalie