The transits in europe (which the new transit is supposed to be based off of) are quite capable in the carrying cargo department. Interior wise, they are larger than anything but a cutaway E-series. I dont know if Ford will be hauling over the jumbo van, but it can carry 3500lbs, and has a comical amount of room. It looks like a bloated version of the sprinter van. The other thing i am not sure of is if ford will re-rate the transit in the US. In Europe, laws about commercial vehicles are pretty clear. If the GCWR is more than 7700lbs, then you need a different/commercial license. In the US, you are not into CDL territory until you are knocking on 26,000lbs.

They are also available in cutaway: