I have a hard time seeing this actually happen.  If nothing else, Polish annexation of Western Ukraine would add something like 20 million people to the Polish population. ~60 million.  Putting on order with the big countries like the UK, France, Germany, and Italy.

A rump Ukraine seems more likely. I do think that union between Moldova and Romania is likely if the Russian try to annex Transnistria. Between this and separatist movements, it's going to be a very different Europe.

And I'll give my consent to any government that does not deny a man a living wage-Billy Bragg