I think Boeing will build the 7E7
There is a good reason for this: the potential for a huge military order. While building 100 aerial-refuelling tankers based on the 767-200(ER) design might be good, I think Boeing would be better off kiboshing that idea, do life extension program that upgrades the entire KC
-135E fleet to KC
-135R standards, then build the 7E7
in both commercial and military variants off the same production line. That way, Boeing can phase out the production jigs for the 767 and use 7E7
production jigs in the former 767 production area.