Filmmaker Nia DaCosta isn’t a stranger to stories about the power of vengefulness or forgiveness. Her directorial debut “Little Woods” sees its protagonist (Tessa Thompson) trying to create a life when local vengeance gets in the way, while “Candyman” sees artist Anthony McCoy (Yahya Abdul-Mateen II) get ever closer to folklore’s Candyman, the vengeful spirit of a wrongly murdered man who can overtake your life if you whisper enough times into a mirror.