A Movie Can’t Be Just Its Own Thing Anymore

Onslaught, in theaters this week, should be the perfect early-September treat. The aggressive action thriller is gory, loud, and packed with interesting actors, and it has a straightforward premise: Three murderous super-soldiers, the result of some shadowy extra-governmental experiment, have escaped from a lab and are descending upon a small town in New Mexico. A tough-as-nails retired Army sniper named Celeste (played by Adria Arjona), living somewhat off the grid in a trailer park, must use…