Since the Soviets didn't really have enough amphib experience, I doubt that they'd risk their troops in such a Soviet-run operation. What, I think, is more likely is that Soviet troops would be embarked on US ships to support Olympic and Coronet and the initial Soviet landing. However, Would MacArthur consider accepting a Soviet role in the invasion of Japan? That's a mystery. I won't even dare answer that question. There are too many variables to consider that it's giving me a headache.