The release date for Demon Slayer: Infinity Castle – Part 2 may have been inadvertently revealed through a box office tracking website listing. The sequel to the 2025 film, which was a massive commercial success and won Film of the Year at the 2026 Crunchyroll Anime Awards, appears to be scheduled for 2027 according to an "Untitled Sony Pictures Film" entry on The Numbers website, distributed by both Crunchyroll and Sony Pictures.

The listing suggests a domestic release on 17 September 2027 and an international release on 15 September 2027, though Crunchyroll has not officially confirmed these dates. The entry could potentially refer to another upcoming anime film, Solo Leveling — Beyond the System — The Movie, which has also not confirmed its release date. The first Infinity Castle film was the initial instalment of three planned movies adapting Demon Slayer's final chapters, wherein the protagonist Tanjiro Kamado and the Demon Slayer Corps battle Muzan and his demon army.