Ford is rumored to be developing a twin-turbocharged V8, code-named 'Voodoo', which displaces just over 5 liters and, most intriguingly, has a flat-plane' or 180-degree crankshaft (like Ferrari has used in its V8s since 1973). This configuration is like connecting two four-cylinder banks to a common crankshaft. Flat cranks theoretically improve power, throttle response, and the sound at the expense of greater vibration. This EcoBoost V8 should produce near 600 horses.
It will power a Shelby GT350–branded Mustang model that eventually will take over from the GT500, as Ford is desperate to discontinue that car’s costly and thirsty Trinity. It could also find a home in SVT's next Raptor which should be a 2016 model. If Ford's 6.2 liter mill meets it's demise in the Super Duty line, as it did with the 2015 F-150, this 'Voodoo' could be a likely replacement there as well.
Sources: AutoEvolution, SVT Performance, Ford Inside News