That's "Z" as in "Ezzzcellent!"

The initials of the most thrilling film of the summer are W, W and Z.

It’s an SF monster-action film with touchstones of humanity throughout, oddly and satisfyingly. It's intelligent and breathtaking, like a British “cozy catastrophe” novel by John Wyndham on steroids. “Easily the most thrilling movie I've seen this summer. I’ve never heard Dan Hagen invoke the name of our Lord Jesus so many times.” — Matt Mattingly

“If you can fight, fight. And help each other.” — Gerry Lane (Brad Pitt)

Even the New Yorker liked it. And they hate everything.