There are a lot of possible "points of divergence" for USSR. First of all - Czechoslovakia and mutual defense pacts, discarded before Munich. Then Tuchachevskiy and his alleged coup plots, no matter fictional or true. Japanese conflicts, Finland's possible acceptance to exchange territories, Malenkov and others.
But one possability is a clearlly fictional one - the return of Romanovs and restoration of monarchy. Reason is that monarchy was hated by all parties of Russian Civil War. Both February and October relovutions had one common goal - to topple the tzar. White Movement hated the monarchy, with several exclusions.
Kerenskiy hated monarchists, defeated whites hated monarchists, all spectrum of reds hated monarchists. They had literally no support inside USSR.
But one possability is a clearlly fictional one - the return of Romanovs and restoration of monarchy. Reason is that monarchy was hated by all parties of Russian Civil War. Both February and October relovutions had one common goal - to topple the tzar. White Movement hated the monarchy, with several exclusions.
Kerenskiy hated monarchists, defeated whites hated monarchists, all spectrum of reds hated monarchists. They had literally no support inside USSR.