To be honest, even if the Mustang goes 4 cyl only, millennials aren't going to look at the Mustang.
They either look at public transporation/bicycles (hipsters) or BMW's/Audi's (yuppies) or just a car to get from A to B.
I hardly think a younger kid in my generation to look at a $25-30K Mustang 4cyl when they can buy a well optioned used 3 or 4 series for the same price.
Just being honest, but really think Ford will fail if they're targeting the Ecoboost to the younger generation.
2012 Mustang GT Premium
BLACK on BLACK 401A. A6, HIDs, Security, Rear Camera+Reverse Sensing, Remote Start, Comfort.
(Planning on CAI/Tune then I'll be good)