A long-lost sequel from 1983, "Grizzly II: Revenge," finally surfaced for release in 2020 and 2021. The story centers around a massive grizzly bear mother who seeks vengeance after poachers kill her cub. Her rampage unfortunately coincides with a major rock concert that can’t be called off. Steve Inwood portrays the chief ranger, Deborah Foreman is his daughter, Deborah Raffin plays an expert on bears, John Rhys-Davi…