Billions of people are gearing up for the month-long World Cup extravaganza that starts in Brazil on Thursday. Most people know which team they’ll be rooting for: national or regional representatives; squads with mega-superstars like Argentina’s Lionel Messi or Portugal’s Cristiano Ronaldo or Brazil’s Neymar de Silva; teams with flair, like Spain, or exceptional teamwork, like Chile. And then there are the...