You're forgetting about the old Taurus SHO. It wasn't an uber conservative old person sedan, far from it in fact.
The 500 name flopped for the same platform. Change the name back to Taurus and their sales turned around. Now they are also targeting the youth market on the same platform. You'll still have the "base" models that aren't so wild. Yet they'll be able to capture some of the youth market with a 4 door sedan with style and power.
I was never a Taurus fan as I found them genuinely gaudy. But the SHO did in fact interest me.
Caveat: I'd like to see Ford do a AWD 2.3T in the Fusion. The mechanics already exist with the Mazda 6.