Although he didn't give too many details about the upcoming vehicle, Dave Leone, Executive Chief Engineer at Cadillac, said that "We are working on something below ATS [...] one of our strengths in sedans is that we are known for being rear-wheel drive."If the automaker can pull this off, the car could be a real contender in a growing market, wich currently includes the Mercedes-Benz CLA, the Audi A3 Sedan and the Acura ILX.Most likely, the new creation from Cadillac will use a version of the Alpha platform that already serves the ATS and CTS. This could also end up being a challenge, as the platform was originally developed for bigger vehicles. Making the platform smaller could make packaging difficult.On the other hand, the American automaker has an advantage because the Alpha platform was already adapted for a cheaper car. According to Road and Track , if Chevy can sell an RWD Camaro for $26,000, Cadillac should be able to build a $30,000 vehicle based on the same platform, without too much hassle.The most luxurious brand in the General Motors portfolio kicked the new year with big plans ahead, as this month it is planning to start production of its latest flagship sedan, the CT6 Priced at $53,495, the car is nearly half of what Mercedes-Benz charges for the S-Class, one of CT6's main rivals.For this price, you get a rear-wheel-drive Caddy, powered by a 2.0-liter turbocharged LTG motor, capable of 272 horsepower and 295 lb-ft (400 Nm) of torque.If you're able to pay almost $1,000 more, you can own the more powerful version, motivated by a 3.6-liter naturally aspirated power unit producing 335 horsepower.Finally, the most powerful CT6 has the 3.0-liter LGX V6 engine under its hood. For $64,395, you'll have at your disposal no less than 400 horsepower and 400 lb-ft of torque.