By Joe Boyd Summer means many things. Long days. Beach vacations. Baseball games and family reunions, neighborhood block parties and community fireworks””traditions that make summer great year after year. And, of course, the most consistent summer theme of all: the blockbuster superhero movie. 2016 continues the trend. Just look at the lineup: Batman v Superman, Captain America: Civil War, X-Men Apocalypse, Suicide Squad, and more. It begs the question. Why do we love superhero movies so much? I mean, we clearly do. Year after year, Hollywood spends millions of dollars making these films, and we respond by giving them billions