I don't think there would have been a Soviet Union either. Germany would have smacked the Red Army down in short order not having to reinforce the Western Front.
The Germans were going in reverse well before the Western Front got started. Also, until shortly before D-Day almost all the German units on the Western Fron were second and third rate units, with the elite units facing the Commies.
Almost 90% of the German soldiers who died during WWII were killed by the Red Army.
Once the Soviets recovered from the shock and surprise of Barbarossa, the Germans were no longer able to roll over them. And, as numerous attackers (Charles XII, Napoleon, Hitler) have discovered, if you don't beat the Russians quickly, you won't beat them at all.