By Owen Gleiberman
Updated November 30, 1990 at 05:00 AM EST

If you took all the head-splitting action comedies that came out last summer, removed their plots, and mashed them together, you’d have Predator 2, a grimly incoherent pile of urban-blowout clichés. A trashed, quasi-futuristic Los Angeles is menaced by some sort of Jamaican voodoo cult, and also by the monster from the first Predator — an alien warrior who looks like a cross between Whoopi Goldberg and RoboCop. The whole noisy movie is really just a setup for the climactic duel between renegade cop Danny Glover and the monster. By that point, you’re pathetically grateful for a few stomach-churning special effects. D-