What if Hitler decided that he would not release any naval assets against the Allies until after the fall of France in June of 1940?
So while Germany had all the same assets they went unused. No Uboats, no Raiders, no Magnetic Mines, nothing.
This would also assume that there was no attack against Denmark and Norway (since no Altmark incident) at least that Germany would initiate. If the UK invaded one of those nations how would that change the world view of the war?
What would the politics of this move have done to the UK and world opinion of Germany?