Prior to the setback of the Battle of Britain, Hitler was talking of war with the Soviet Union in 1942 or 1943. The timing was advanced because he (wrongly) concluded that the British were holding out in the hope that the Soviet Union would come to their aid and that if he defeated the Russians quickly, the British would negotiate. He gambled that the Soviets would collapse so quickly the British wouldn’t have any opportunity to make use of the fact that Germany was fighting a two front war. Hitler had been vehemently opposed to fighting a two front war, seeing it as the reason Germany lost the First World War, but he thought the British were quiescent and the Russians weak so he gambled.
With the British fighting the Soviets there is no possibility of anyone making the mistake of assuming that they were waiting for Russia to rescue them; Hitler would not have rushed forward his plans for the Soviet Union.
That is true.