Its second-week slide is one of the largest in history. Story by Matt Cummings Batman v Superman: Dawn of Justice witnessed a monumental drop in its second week in theaters, marking it as one of the highest declines ever. At 68% (far higher than the traditional 60%), Warner Bros.' tentpole is starting to look like a misfire. After a strong domestic opening of $166m, the pundits were scratching their heads as to how a film with a "B" CinemaScore and a 29% Rotten Tomatoes rating could rake in that much cash. Additionally, Monday ($33m) and Tuesday ($15m) showed strong numbers, possibly indicating a backlash by audiences who wanted to see it for themselves. But as the week wore on, numbers began to decline rapidly, with Thursday offering just $7.7m. This weekend's decline places it with other not-so-great company, including 2015's Fantastic Four (68.2%) and X-Men: The Last Stand (66.9%) The whole free fall obviously should have WB and the Zack S...