Footage claiming to be the leaked opening cinematic for the cancelled mobile game Kingdom Hearts Missing-Link has surfaced online, sparking intense speculation among Kingdom Hearts fans. The clip depicts scuba divers and jetpack-wearing warriors wielding Keyblades fighting a Heartless creature called a Darkside, before the setting shifts to a city resembling Quadratum, the location featured in the upcoming Kingdom Hearts 4. There is no official confirmation that the footage is genuine, but many fans argue it contains too many precise lore details to be an AI fabrication, even though it first appeared on 4chan before spreading across social media.

Kingdom Hearts Missing-Link was announced in 2022, went through several years of beta testing, and was ultimately cancelled last year; its 2024 trailer had billed it as a "GPS Action RPG" set in Scala ad Caelum. Fans have noted visual similarities between the leaked clip and the official teaser, including matching character designs and an identical closing shot of a figure in a black fedora, fuelling belief in its authenticity. The leak arrives amid heightened fan interest in Kingdom Hearts 4, which recently got a new trailer and a confirmed Nintendo Switch 2 release but still has no release date despite being announced in 2022.