“Archenemy” (** out of four) was a murky sci/fi saga about a grizzled homeless drifter (Joe Manganiello) who rants and raves about being a hero from another dimension who fell to Earth and no longer has any powers; no one believes his story except for a local teen (Skylan Brooks) who soon begins to realize that he might be telling the truth which could mean apocalypse now. Lots of style and noise but little substance and even less sense in this nihilistic end-of-the-world thriller. Far from being the worst of its grungy ilk but don’t exactly hold a spot for this at next year’s Academy Awards.