The Return of Swamp Thing

In "The Return of Swamp Thing" (1989), the story follows the titular Swamp Thing, a humanoid plant creature, as he battles against a villain named Dr. Arcane who is obsessed with unlocking the secret of immortality. Along the way, Swamp Thing teams up with a group of allies to protect the environment and thwart Dr. Arcane's nefarious plans. The film combines action, humor, and sci-fi elements as Swamp Thing faces off against various threats in a battle to protect nature.