So if I'm not wrong, France at the time of 1939-1940, had the largest, most productive industrial capacity in Europe.
Though Fall Gleb did some damage, full scale repair of demolished industrial centers near the Rhineland and Paris was surely possible...and that's not even mentioning the nearly untouched south and south western regions
The being said, what if the Germans had better utilized said industries, instead of just plundering everything in sight.
Might a stronger, integrated Franco-German military industrial complex be able to out produce, or at least compete with the Soviet Union during Barbarossa?