What if Arrow‘s titular vigilante scolded scalawags by growling, “You have failed this f–king city!”? What if The Flash‘s Cisco greeted the latest Wells doppelganger by groaning, “Great. Another f–king a–hole.” We never hear such expletives uttered by the heroes (or villains) of broadcast-TV’s Arrowverse slate, which also includes Supergirl, Legends of Tomorrow and, eventually, […]