Well, sure lots of butterflies if this happens between September 1939 and May 1940. Having said that, I don't see how this would change what happens in France - if anything this would draw more forces to the Middle Eastern area from the UK and France. It certainly would not change the political malaise in France or the doctrinal thinking that contributed to the fall of France. Given that Hitler would have been perfectly happy to pursue a campaign against the Soviet Union leaving France and Britain alone if they had done for Poland what they did for Czechoslovakia (ie: sell them out) I see no reason to expect Germany won't go east unless they have lost in France which is unlikely...