The most useful thing to come out of the new official Onslaught trailer is not the body count. It is the address. At San Diego Comic-Con, Wingard described Onslaught as the completion of a loose trilogy formed by You’re Next, The Guest, and this new film. He also confirmed that Onslaught takes place in the same town as The Guest and explores another part of the secret program that produced David, the character Dan Stevens played in the 2014 film. At the same convention he confirmed the connection is more than thematic. Onslaught takes place in the same universe as his 2014 cult favorite, and the genetically engineered soldiers tearing through the desert come out of another branch of the secret military program that produced David, the character Dan Stevens played in that film.
A Shared Universe, Not a Sequel
That is a shared-universe follow-up, not a sequel. Nobody from The Guest is picking up a storyline. What carries over is the program, and the program has apparently been busy.
What the New Onslaught Trailer Shows
The trailer opens the door on what it has been building. Adria Arjona plays Celeste, an Army sniper raising her young daughter in a desert trailer-park community, which is a specific and unglamorous place to set a siege movie and immediately more interesting than another fortified compound. A squad of engineered soldiers escapes a nearby facility. The footage cuts between clinical laboratory material, night-shot desert, neighbors who are not remotely equipped for this, and Arjona working a rifle with the calm of somebody who has done it professionally.
What makes the footage land for a horror audience is how the attackers are shot. These are not soldiers moving in formation and taking cover. They advance. Rebecca Hall’s character supplies the framing in trailer dialogue, describing the program’s output as the human equivalent of a heat-seeking missile, and the visuals back it up. Gunfire connects and they keep coming. The trailer gives them codenames rather than ranks.
The tonal blend on display is unusual, and that is the appeal. There is a military conspiracy thriller running underneath, a home-invasion horror movie happening at ground level, an action film’s worth of firepower in the middle, slasher-grade pursuers doing the actual killing, and the dry, faintly deranged sense of humor that Wingard and Simon Barrett have been sharpening since You’re Next. Barrett wrote the screenplay. He and Wingard also worked together on The Guest and Blair Witch, and The Hollywood Reporter’s original 2024 announcement listed both men on the writing, so expect the finished credits to reflect a long partnership rather than a work-for-hire assignment.
Who Stars in Onslaught
A24 lists the cast as Arjona, Stevens, Rebecca Hall, Drew Starkey, Michael Biehn, Reginald VelJohnson, Eric Wareheim, and Alex “Poatan” Pereira. Pereira, UFC fighter and former two-division champion, plays one of the engineered killers, which is casting logic that requires no explanation once you see him in frame. Biehn plays the leader of a mercenary unit sent to contain the situation, and putting the star of The Terminator and Aliens in a movie about unstoppable manufactured pursuers is a joke Wingard clearly enjoys. VelJohnson and Wareheim appear as members of the trailer-park community, which is either very funny or a warning, depending on how the script treats them.
Stevens is the name that will drive the speculation. He starred as David in The Guest, and Wingard has now confirmed that both films share a program. What Stevens is not doing is reprising that role. Available listings identify him as a German scientist connected to the experiments, with Hall’s character working alongside him, and no official character link to David has been announced. The shared-universe reveal makes the casting a lot more interesting than a simple reunion, but it is not a return.
Onslaught Release Date and Rating
A24’s official synopsis keeps things blunt: a rogue squad of genetically engineered super soldiers breaks loose in the desert, and an Army sniper has to use her training to protect her young daughter.
Onslaught reaches theaters on September 4, 2026. The Motion Picture Association has rated it R for strong bloody violence, some gore, sexual material and nudity, and language, per Film Ratings, which tracks with a trailer that does not appear interested in restraint.
The reason this concept is worth attention is the collision itself. Super soldiers usually belong to action movies, where they can be outfought, outsmarted, or blown up by the third act. Slashers belong to horror, where the rules are different and the thing coming toward you is not negotiating. Onslaught looks like it is filing military hardware under the second category, and a genre that has spent fifty years asking what you do when the killer will not stop walking now has a version where somebody built the killer on purpose and signed off on the budget.
Watch the new official trailer below.
