"The Devil Wears Prada 2" has marched into Korean theaters in formidable fashion, opening atop the local box office Wednesday with the year's biggest opening day to date. The 20th Century Studios sequel sold 150,769 tickets on its opening day, according to the Korean Film Council's box office tracker. It edged past the opening-day haul of homegrown phenomenon The King's Warden — the period drama that has dominated the market since its February bow and now sits as the highest-grossing Korean rele