My guess is that this is going to be marketed to our less close allies to whom we are unwilling to sell JSF planes.
However, I suspect they would love for the US Defense Department to help fund there development costs as a hedge against delays in the F-35 program.
It's also politically incorrect for Boeing to say they are doing development for the foreign arms market.
The only advantage the JSF would have over an aircraft like this would be it's stealth.The proposed Super-Eagle has more range,payload,agility than the baseline F-35.