A spoiler-packed guide to all that’s off about the superhero clash, from Lex Luthor as a malfunctioning android to Bruce Wayne’s fickle take on demolitionThis piece contains spoilers for Batman v Superman: Dawn of Justice. Don’t read it unless you’ve seen the film or don’t care about spoilersLike a big, wet glob of fetid bird droppings tumbling down from the sky, Batman v Superman: Dawn of Justice has landed with an audible splat.