Director Bong Joon-ho has maintained an impressive streak of dramatically satisfying films, displaying wonderful creativity with efforts such as “The Host,” “Mother,” and especially 2014’s “Snowpiercer,” which astounded with its tonal confidence, dark comedy, and vivid performances. The helmer returns to duty with “Okja,” another strange event from a man who has considerable experience in the realm of oddity. What begins as a tender tale of friendship between a little girl and her gigantic pig becomes something incredibly wild and grim, while still retaining engaging action and offerings of social commentary the keep the viewing experience lively, even when it already involves the antics of a massive CG-animated creature.  Read the rest at Blu-ray.com