i think that instead of creating a modern day KR you should focus on extending the current KR to 1964 with alternative endings, here are some possibilities
1) Commune victory over German Empire(includes socialist italy and USSr not USA) would possible turn many nations against them and end up in commune vs the world scenario
2) German Empire victory over Commune would lead to the independence of the Uk nations but the WW1 losers (Commonwealth plus France and others) would hire new allies and start a cold war scenario focussed around the uk,france,india and china. (This scenario would have the tsar in place but may have communist uprisings in russia still as a result)
3)Commune loses to both Germans and Commonwealth, French and British governments are restored to their rightful place, those governments plus japan could lead to a delayed ww2 that has the kaiser as the leader of germany instead of Hitler. (This scenario has a defeated USSR that would ally with Britain,France more closely than it did in historical ww2)
4) number three plays out (Nationalist Russia inplace instead as defeated russia) but Britain, France and Russia lead a new age of colonisation with agreements to divide lands, France has indochina, Central America and its African holidings (plus belgium Congo and Portugese colonies). Britain has India, Australia, Indonesia (at Japans dislike) but aims to retake the USA. Russia aims at china and khazakstan and retaking its lands around moscow, Volgograd and St Petersburg through revolts and uprisings. The Germans, Japanese and USA all have reactions to these events.
That's just my ideas anyway