Trailer for “Spider-Man: Beyond the Spider-Verse” Appears Online as Co-Writer Chris Miller Warns Against Leaks

A trailer for the upcoming animated film “Spider-Man: Beyond the Spider-Verse” has circulated online in the form of leaked footage described as unfinished, according to a report published Aug. 14 by Deadline. The leak, shared on social media, accelerated attention on a movie that is scheduled for a June 18, 2027, theatrical release.

The report identifies Chris Miller as a co-writer of the film and says he responded to the leak by criticizing the release of material that is not yet complete. Deadline reports that Miller said he is “not a fan of leaks of unfinished footage,” framing his reaction as a concern about work-in-progress being distributed before final versions are ready for audiences.

Miller’s comments land at a time when animation and post-production schedules are tightly managed, and when studios typically prevent unfinished work from leaving controlled internal channels. While the Deadline report does not specify what stage the leaked materials were in beyond describing them as unfinished, it ties the leak directly to the unauthorized appearance of a “trailer” online rather than an official studio release.

“Spider-Man: Beyond the Spider-Verse” is billed as the third installment in the animated Spider-Verse franchise centered on Miles Morales. The Deadline report describes the leaked item as a trailer for the film, reinforcing that the circulation involves promotional material intended for an eventual official launch, not merely unrelated clips or behind-the-scenes production stills.

The leak also raises practical questions familiar to film and television productions, including how internal drafts and rough edits are protected, how quickly unauthorized uploads spread across platforms, and what steps studios may take once material is posted. Deadline’s reporting focuses on Miller’s response rather than detailing any formal legal action, takedown requests, or platform enforcement measures in specific terms.

For audiences, the incident means that early versions of promotional footage may become the public reference point even though the film’s release date remains more than nine months away. For the creators and production teams, the circulation of incomplete work can complicate how later updates are interpreted, particularly if scenes or edits change between drafts.

Deadline’s account indicates that the discussion around “unfinished footage” was not limited to passive viewing. By speaking out against leaks, Miller placed the controversy in a broader context of production discipline and the need to keep pre-release materials inside the official workflow until the studio is ready to present them to the public.

As of publication, the report does not indicate whether additional leaked footage will appear or whether the studio will provide an alternative official release to replace what has circulated. The next publicly expected step remains the film’s scheduled theatrical rollout on June 18, 2027, as originally planned for the third animated Spider-Verse movie.

The full story is based on Deadline’s coverage of Miller’s reaction to the online leak described as an in-progress trailer, with the report emphasizing that the materials were not yet finalized. The incident serves as another example of how quickly entertainment content can escape controlled release timelines, especially once social media users begin sharing unauthorized video files before final production approvals are complete.