been a theory tossed around in the 2009+ forum for quite some time.
not really a reality. when gas was $4.5 to $5 a gallon in 2008, there was a huge push to get a diesel in the bigger trucks/SUV's...but now that it's under $2.50 in most areas...not so much.
we might someday see one, but more likely we'll see the Ecoboost first