Zack Sharf Keanu Reeves is back to crushing skulls and making movie theater owners scream with adoration, as the star closed CinemaCon with a first look of “John Wick: Chapter 4.”Appearing during the Lionsgate presentation at the annual exhibition trade show, Reeves was greeted with lusty applause and chants of “You’re the man!” from attendees.The next installment once again teams Reeves with stuntman-turned-director Chad Stahelski. Lionsgate has high hopes for “John Wick: Chapter 4,” considering each chapter in the franchise has outgrossed its predecessor.