Cadillac is getting ready to launch the much anticipated rear-drive ATS and new flagship XTS this year. The Lincoln MKZ concept shown at this month's Detroit Auto Show was very well received, and will be followed by six more new and refreshed vehicles by 2014.

Earlier this year, General Motors CEO Dan Akerson told reporters he thought "holy water" should be sprinkled on the Lincoln brand. Ford's marketing chief Jim Farley dropped the "F" bomb on GM in Bill Vlasic's "Once Upon A Car" book, and says brands like Caddy, Lexus and BMW have become "big box" retailers.

AOL Autos Editor-in-Chief David Kiley, in his HuffingtonPost Grand Blvd. column, looks at whether the old rivalry between Caddy and Lincoln can be rekindled.