theory

That's highly unlikely imo, even including the pre-ww2 period. China, no matter who came out on top, did not have the industrial or military capacity to launch an invasion beyond their historical borders.

The defeat of the CPC would've definitely been a disaster that would alter history to the point its impossible to even guess what the alternative would be. But even then the KMT and the CPSU had cordial enough historical relations that the turn to becoming an Eastern anti-soviet bastion would be painful slow for the western powers by my guestimate