User blog comment:JCC the Alternate Historian/If the Entente Powers Won the Great War in Southern Victory/@comment-21519-20180730023440

Yeah, sorry, you asked me that before and I forgot to answer.

I'm always skeptical of any AH that has Imperial Russia make a comeback at that late date. The way it happened in 191, with the victorious Kaiserreich really putting its back into helping the Whites so they wouldn't have to deal with communists in their newly expanded sphere of influence, and with an eye toward repairing their relations with the Romanovs in the late nineteenth century (not that that happened in 191) is the least implausible version that I know of. You obviously can't do that.

If it's just those two options I'd go with the USSR. I'd be interested to see something else altogether, though, like the country being divided among local warlords who battle each other with no end in sight.