There is an argument to be made for setting up a rump Russian Empire/Federation in Ukraine and Belarus in hopes of it providing a popular alternative, especially if the new government doesn't push for Russian domination and can cobble together a good economy. Even if it doesn't work, it would weaken the USSR.He'd probably recognise them for the busted flush they are. It's been over a decade since they lost and they don't have anywhere near the support to get another civil war going. The better bet is still the nationalist groups especially if it can be portrayed as a protectorate from the big bad commies further East.
Plus I love picturing thr Russjan Empire in Kiev and Stalin frothing at the mouth as he sees it