By Claire Young Soldier Field — technically the oldest NFL stadium in the country, if you ignore the Toilet Bowl and stare directly at the columns, which were erected in 1924 — might not play host to its NFL team much longer. The Chicago Bears snatched up an expansive 326 acres in suburban Chicago this October, dropping a whopping $197 million (a bit mysteriously) on the aptly named horse-racing facility Arlington Park, located in Arlington Heights. It’s not the first time the Monsters of Midway came sniffing around the northwest suburb. “The Bears have expressed interest in Arlington Park as …