Opening this weekend: Joker—This is an origin story for Batman’s white-faced, green-haired original nemesis, probably the most famous of all super-villains. Debuting in Batman’s first adventure in 1940—his appearance is said to have been based on Conrad Veidt in 1928’s The Man Who Laughs—the character helped to popularize the “sinister clown” archetype that ultimately led to Pennywise. But this new film, directed and co-written by Todd Phillips of the Hangover flicks, shows us the Clown...