Hi Jeff. Personal opinion here: Doing a full drive-train swap from a Fusion to Fusion would be a headache.
Doing a drive-train swap from a Fusion to a Mazda 6 would be a bigger headache (even despite the family similarities).
Doing a drive-train swap from a Fusion Hybrid to a Mazda 6 would be an even bigger headache than either of those headaches, x3 and/or more.
I am sure others will jump in with more advice, so keep us updated and good luck.