Well several things might have occurerd.

1. France and England were in no shape to actually go to war with Russia, so the outcome might have very well been the same scenerio which Germany experienced with France before she invaded......

2. Russia, on the other hand would have had plenty of time to mobilize for war, which she had not done at the time of Operation Barbarossa.

3. Germany might not have attacked Russia, instead moving its 3 million troops to other places like Africa and secure the oil which Germany desperately needed.

4. Barbarossa was a pretty big reason why operation Sea Lion did not occur. Had this been the case, Great Britain might have very well found her self in a bit of trouble.

There are ofcourse many and many outcomes which could have accured none if favor of the Allies. Even an alliance between Germany and Russia might have been possible. One thing is for sure, this would have seriously complicated the situation in Europe and the world.

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The war against Russia will be such that it cannot be conducted in a knightly fashion. This struggle is one of ideologies and racial differences and will have to be conducted with unprecedented, unmerciful and unrelenting harshness. -Adolf Hitler