In Japan, top-of-line 25S L Package 2WD with SkyActiv-G 2.5L is 2,986,200 JPY ($26,793.69 USD) and 4WD is 3,213,000 JPY ($28,809.48 USD). However on the States side, 2017 CX-5 Grand Touring base MSRP is $29,395 on FWD; $30,695 on AWD. Destination charge is $940. We need to add another $1,830 for Grand Touring Premium Package as Japanese top-of-line 25S L Package has everything we have and more! So for top-of-line 2017 US CX-5 GT with Premium FWD is $32,165 and AWD is $33,465.
Now the top-of-line SkyActiv-D 2.2L diesel CX-5, XD L Package 2WD is 3,299,400 JPY ($29,581.33 USD) and 4WD is 3,526,200 JPY ($31,606.14 USD) in Japan. So in theory, we'll see about $2,800 increase for a diesel CX-5 when it becomes available in the US. How many of you are willing to pay $36,262 to get a top-of-line diesel AWD CX-5?
Fuel economy rating in Japan for diesel XD L Package 2WD is 18.0 km/L (42.3 MPG) and for 4WD is 17.2 km/L (40.5 MPG). For 2.5L gasoline 25S L Package 2WD is 14.8 km/L (34.8 MPG) and for 4WD is 14.6 km/L (34.3 MPG). Based on big difference on SA-G 2.5L fuel economy ratings between Japan and US EPA, we can predict the SA-D 2.2L diesel CX-5 would have much lower EPA ratings in the US than Japanese ratings.
That's why I don't feel diesel CX-5 is attractive to me. It's going to be a hard sell in the US market IMHO.