Last week GM officially unveiled the 2011 Buick Regal, which many of you may easily recognize as the Opel Insignia with a Buick grille. Well it looks like GM has more in the works than just the front-wheel-drive four-cyl powered Regals that were unveiled. Bob Lutz confirmed that GM is discussing the possibility of 335-hp all-wheel-drive model, which makes sense, since Opel offers the Insignia OPC with a 325-hp turbocharged engine and all-wheel-drive. In addition to a more powerful Regal, Lutz also stated that GM is considering a Regal Sport Wagon.