I genuinely don't think you know what you're talking about.
Seriously. The only vehicles Lincoln is competing with at its current level are other Ford vehicles. They need to step it up or go home. In my honest opinion, if Ford wanted to keep this path of just building redesigned/luxury version of other Ford vehicles, they killed off the wrong company. Lincoln should have died in 2010 and Mercury should still be here. Mercury namesakes like Sable are much more notable than MKS.
Ford keeps talking about a "Comeback" for Lincoln and they're not coming back if Ford keeps
-footing around with "me-too" concepts like this Escape clone.
Also, the Mkz fits a V6 because it is a different platform. Fusion/Mkz is not the topic of discussion.
This concept is built on the Escape which is on the Global C1 platform. We haven't seen a V6 on this platform or even heard of it. If this went into production tomorrow, 1.6 base, 2.0 optional is the most likely combination. It won't matter (as I've previously stated and you've clearly misunderstood) as next generation ecoboost engines are more apt to be on the spec sheet instead.
I would NOT count on seeing a V6 on this platform, ever.