Probably to be taken with several grains of salt since I’ve never heard of the source, but if this is true it would be very interesting. It seems like a much riskier move than moving the 6 to RWD since the CX-5 is Mazda’s bread and butter, at least in the US...but it would make for a mighty attractive SUV. The CX-9 is probably going to RWD as well, needless to say.
Also of note is that the inline 6 is mentioned to be a 3-liter with 281hp.