Considering that Germany would have follow a different strategy in 1940 and opted for not invading the whole France, occupying only Alsace-Lorraine and then forcing France into negotiations under the threat of a full scale invasion:
Would there have been any chance of France accepting the loss of A-L in exchange of the Francophone Belgium (with Flanders, Lux and Netherlands going to Germany) in an eventual negotiation of peace (please, consider that France would be highly pressed in this case)?