Batman and Superman duke it out in a grimdark setting that involves lots of glowering, real estate-flattening explosions and concrete-colored costumes. The action is frenetic, the production design is faithful to its comic book roots and there's plenty of fan service—but the film just doesn't differentiate its heroes enough for the long-awaited confrontation to feel particularly justified. Batman and Superman are now both dark, brooding, murderous vigilantes feared by polite society. This crowded, lengthy film wastes a lot of energy setting up future Justice League films, but doesn't spend enough time being fun or escapist or particularly entertaining.FULL REVIEW:Superheroes battle to see who can cause the biggest explosion in unnecessarily dour franchise filler by Devin D. O’Leary (3/24/2016). 153 minutes PG-13.