General Motors has reportedly given the go-ahead for a large flagship Cadillac
sedan as it continues to prepare its luxury brand for an all-out attack on every possible segment its main rivals compete in. This is according to Automotive News, which projects the flagship sedan will be built on a new RWD platform dubbed Omega and launch sometime in 2015 to challenge the likes of the BMW
7 Series, Mercedes-Benz
S-Class and Lexus LS
in the full-size luxury sedan segment.