Board Thread:Timeline Discussions/@comment-5263942-20130313004902/@comment-6938617-20130313170540

I have been working on something similar, actually. I think that Byelorussia/Belarus, the Ukraine, the Baltic States, Georgia, Armenia, Azerbaijan (depending on the exact year) and Moldova would probably become their own countries, as in OTL. Abkhazia, a de jure part of OTL Georgia, would definitely break away if it had the chance to do so. Transnistria might also do the same in Moldova. As for what might happen in Russia, it's plausible that breakaway states such as South Ossetia and Chechnya might succeed in breaking away from the USSR. Otherwise, Russia itself could remain intact, or it could possibly split along ethnic lines, depending on the exact situation. A group of Soviet hardliners might form their own remnant government somewhere in Russia. There is a  chance that the Jewish AO (the Jewish Auntonomous Oblast) might secede if it could. If Russia proper were to break up, it is almost certain that the Finnish would use this as an opportunity to invade whatever successor state existed in the Archangelsk/Murmansk region and try to take back the areas lost in the Winter War and Continuation War. They might even advance further.

I hope this helps.