Overview
- The first Onslaught trailer is currently playing in U.S. theaters before screenings of Backrooms and reveals a September 4, 2026 wide theatrical release.
- Adam Wingard directs a script by frequent collaborator Simon Barrett, with A24 handling worldwide distribution and Lyrical Media listed as a co‑financier.
- Adria Arjona leads an ensemble cast that includes Dan Stevens, Rebecca Hall, Michael Biehn, Reginald VelJohnson, Eric Wareheim, Drew Starkey, and UFC fighter Alex “Poatan” Pereira.
- Published descriptions say the film centers on a trailer‑park mother who uses a particular set of skills to protect her family from a menace that escaped a secret military base, and the trailer frames the antagonist as an unstoppable, Jason‑like killer.
- The trailer has not yet appeared online so wider marketing and full promotional assets remain pending, and the rollout positions Wingard and Barrett as returning to the smaller, ultraviolent tone of their earlier cult work.