2014 Cadillac CTS spy shots - front three-quarter view

There's an old newspaper adage that dictates: "Dog bites man" is not news. "Man bites dog," now that's news. In other words, the subversion of the usual order of things is what sells papers. And you might say the same about Cadillac. A Caddy getting bigger, by that logic, is hardly news, but a Caddy getting smaller sure is.

That's what makes the new ATS such a big step for the top-end of the General Motors brand portfolio. Occupying the place once taken by the Catera (which led to the CTS), that model now has to kick up a size to make room for its new baby brother. And so it appears to be doing.

These spy shots show what our intrepid auto paparazzi say is the next-gen CTS, applying the same Art & Science design language to a slightly larger form that's expected to switch from the Sigma II platform to a stretched version of The General's new rear-drive Alpha architecture.

In between the camouflage we can make out a new grille, projector headlamps with LED daytime runners, with radar sensors aplenty and dual exhaust tips around the back. Sources expect a 2.0-liter turbo four to come in with 270 horsepower as the base engine in the new CTS, with the 3.6-liter V6 also expected to be on offer as well as a turbo six sometime after production kicks off at Lansing Grand River Assembly in September 2013.