“People need a villain to believe in,” says the snarky two-toned haired Cruella (Emma Stone). Based on the Dalmatian thieving megalomaniac fashion designer that first cackled her way through a 1961 Disney animated film, “101 Dalmatians,” and the 1996 same-titled live-action feature, this iteration of the character is caught between villainous madcap swings and heroic revenge.