From late 2014 through 2015, there was growing speculation in industry circles that airline heavyweight United Continental (NYSE: UAL) would order jets in the 100-seat size class from either Bombardier (NASDAQOTH: BDRBF) or Embraer (NYSE: ERJ). This would have filled a gap between its largest regional jets, which have 76 seats, and its smallest mainline plane, the 126-seat Boeing (NYSE: BA) 737-700.