Comments from GM's Communications executive signal that Cadillac's mystery concept may indeed be a new XTS concept. Details inside.

General Motors Vice President of Communications Chris Preuss revealed that the mysteriously teased Cadillac concept may indeed be the Cadillac XTS.  The revelation was made in a Twitter conversation with American high school student Alex Donegan.

Donegan seemingly started the conversation by asking, "Some info on the GMC Granite and others that will be at NAIAS?"

Preuss responded, "Granite. XTS. CTS-V coupe. Aveo RS (all new). Regal. A CFO."  His reply references the GMC Granite (based on the Chevy Orlando concept), the XTS, the 2011 Cadillac CTS-V coupe, the all-new turbocharged Chevrolet Aveo RS, and the 2011 Buick Regal.  The last part of his comment possibly refers to new GM Chief Financial Officer, Chris Liddell.

GM distributed a teaser shot of Cadillac's impending concept debut, which appears to show a four-door car.  The prototype is another step in the brand's Art & Science design theme, following the Converj, CTS Coupe Concept, and the Sixteen.

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