'Onslaught': Adam Wingard's A24 Action Horror Flick Sets September Release Date!! #AdriaArjona, #AlexPoatanPereira, #DanStevens, #Onslaught, #RebeccaHall, #MichaelBiehn, #DrewStarkey, #EricWareheim,  #MauriceGreen, #ReginaldVelJohnson