Finally an end to all the rumors:

"Cadillac confirms that it's working on the super-sedan for launch about two years hence. Details remain closely held, but several things are known:

•The car will use a rear-drive chassis very loosely based on the CTS. There will be an all-wheel drive version, too.

•It will not be based on GM's Australian Holden rear-drive cars. Holden has been a source for other big, rear-drive cars, most recently the Chevrolet SS.

•It will not necessarily replace the XTS, which is based on a front-drive chassis, and also offers an all-wheel-drive variant. XTS is nearly as popular in the U.S. as Caddy's other two sedans, ATS and CTS. And XTS is a big hit in China, which is a huge market for GM.

•The super-size Caddy sedan won't resemble the brand's recent concept cars, but will use some styling highlights from them, such as the knife-edge row of lights on the front fenders, similar to the new CTS."

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http://www.usatoday.com/story/money/ca…