We have endured much, my moviegoing friends—we have met our challenges, we have stood strong, we have survived. Of all the assaults we’ve faced, perhaps none were so brutal as last spring’s Batman v Superman: Dawn of Justice, a bewildering, interminable slurry of fascism and digital violence. Batman v Superman made $900 million, but its astonishing badness cost Warner Bros. no small amount of goodwill: Sure, the film paved the way for more movies starring DC Comics characters. It also made no one want to see them…