Seems to be a lot of interest from Poland as well. They don't have the auto credentials of Germany, and perhaps a somewhat less stable political situation, but they seem more eager to attract Tesla, and it'd likely be cheaper / faster to build, and cheaper to operate, in Poland.
I can't imagine Tesla ever choosing France. They love strikes too much for Tesla's tastes. They're just as protectionist to their current auto industry as Germany is, with the French government owning a large stake in Renault. Etc. I just see nothing that would make them choose France.
It looks to me like a contest between Poland and Germany.