The 10-speed automatic transmission would make good use of the 5.0’s torque. The first few gears will have ultra low gearing. So the 6.2 would not really be needed in the Expedition. A diesel engine would make more sense than the 6.2. An experimental Expedition (U324) has been tested with the 4.4 liter "Lion" V-8 diesel engine, and this is still a possibility, later on, but don’t expect that motor to be available at launch.