Fortnite's Chapter 7 Season 4 has begun introducing crossover characters from other video game franchises, including Sonic the Hedgehog, Spyro and Crash Bandicoot, with Kingdom Hearts' Sora widely expected to follow. Epic Games had teased Sora's Keyblade as part of the season, but leakers now say the collaboration has been pushed back, disappointing fans who had anticipated its arrival with the season's first major patch.

Datamined files reportedly show that the Kingdom Hearts crossover was originally planned to launch this past weekend, with vehicle cosmetics shared between Fortnite and Rocket League pointing to a coordinated rollout, but decryption of the event files suggests it has now been delayed until the next scheduled update on Thursday, 17 September. Patch v42.10, which went live on Thursday without the promised content, left the collaboration's release unconfirmed by Epic Games. In the meantime, several Kingdom Hearts-themed vehicle cosmetics intended for Rocket League and Fortnite have already been revealed through data-mining, giving players an early look at the customisation options to come.