I saw once on the history channel that high elements in the Nazi government wanted a German?Soviet/Japenese Axis. They speculated that the tech of Germany, the resources of the USSR, and the "second front" provided by Japan would make this new Axis invincible.
So the question here is: What if the Soviets joined this Axis, and Hitler saw the logic behing it and went along, and the Japenese got over their negitave relationship with the Soviets to make it happen?