Just be glad they didn't show a Ford F-750! I really wish Ford would choose another engine for the 650 and 750. Not that there is anything wrong with Cummins, it's just embarassing.
There will be a Ford engine in the 2012 medium duty F-series, the 3V 6.8l backed by the 6R140 auto. From what I'm seeing the 6.7l Cummins engine will still be offered in varying power levels from 200hp to 300hp.