Overview
- A24 put the first full Onslaught trailer online on Tuesday, June 2, after screening it in theaters ahead of Backrooms, and the footage confirms the film’s plot, tone, and a U.S. release date of September 4, 2026.
- The film stars Adria Arjona as a former Army sniper who must protect her daughter when a squad of genetically engineered super soldiers escapes from a nearby secret military facility.
- Press materials and the trailer identify a broad ensemble cast and production team, naming Dan Stevens, Rebecca Hall, Michael Biehn, Reginald VelJohnson, Eric Wareheim, Drew Starkey and reported casting of fighter Alex Pereira, with A24 co-financing alongside Lyrical Media and Ryder Picture Company.
- Trailer dialogue frames the supersoldier program as designed to operate against the domestic populace, a line that anchors the movie’s social subtext about militarized force and institutional secrecy.
- Marketing has leaned theater-first with posters released June 1 and the trailer release on June 2, positioning Onslaught as a deliberate tonal return for Wingard and setting expectations for a violent, cult-genre style rather than a franchise blockbuster.