historian said:
The Soviets did take large swaths of Europe and place them under communist control. The iron curtain was real. Did you mean maybe more territory? The Soviets struggled greatly at very high cost to conquer what they did and with significant aid from the US.
There would have been a power struggle between the Soviets and Germany. Both would have been weakened.
You're right it's speculation, but the point remains - things would have been far worse if the US did not come to the Allies aid.