Yeon Sang-ho ’s “ Colony ” premiered in the Midnight Screenings section at the Cannes Film Festival on Friday, marking the “Train to Busan” director’s return to the zombie genre. This time, he infuses it a distinctly contemporary twist that reflects anxieties about artificial intelligence, collective behavior and the erosion of human individuality. “All along my works, I always tried to express the fear or the horror of today’s society,” Yeon tells Variety . “For me, the greatest fear is the