I would think if that happened, Poland might move into Western Ukraine, and reclaim Lwów, as it was historically Polish. It just might open up a Pandora’s Box, that could lead to trouble all around.
....Poland might move into Western Ukraine, and reclaim Lwów....
That might a good idea, since Western Ukrainians are not Russian! Only a minority them are even Orthodox. [However, many of their relatives who immigrated to America became Orthodox, and even claimed Russian (or Russian-American) nationality!]