The styling will be very derivative, and carry the corporate nose previewed on the 2013 Altima. The hot auto design trend trend is bold crease lines down the side of the car to hide the vertical bulk. Minus the badges, I don't think anyone's mother could distinguish a 2013 Sentra from a 2012 Elantra in a parking lot.
That's the point, though. Make the best mousetrap, the appliance that moves the most volume at the highest margins.