[4] Kevin Costner headlines this big summer popcorn muncher about the legendary archer-turned-rebel who rallies his outcast merry men to battle the greedy Sheriff of Nottingham (Alan Rickman) and fall in love with the fair maid Marian (Mary Elizabeth Mastrantonio). The script covers the familiar plot markers, the sets are grand, the score rousing, and many of the supporting cast give it their all. Yet …