Inside Zach Cregger's mystery-shrouded Weapons. (Photo illustration: Yahoo News; photos: Alberto E. Rodriguez/Getty Images, Quantrell Colbert/Warner Bros./Courtesy Everett Collection.)Filming under code names. Using draconian software to distribute scripts. Holding a press junket where, for the most part, the cast can't say anything.Welcome to Zach Cregger's Weapons, the most secretive movie of the year so far, and by design, one of the hardest to describe. The Barbarian director's highly anticipated follow-up is a multiperspective horror epic that reinvents itself almost every 20 minutes.