In the Michelin roster of pop-entertainment filmmakers, Zack Snyder is the chef who never knows when to stop. If he thinks a dish needs more salt, he adds it not by the pinch but by the bucketful. A little pepper? Somewhere downwind, an entire small country sneezes. Then he pours the whole thing into a…

Army of the Dead Is a Heaping Dish of Turn-Off-Your-Brain Entertainment