Surprisingly, there seems to be little on this.
I found an old thread about if the Whites win the civil war. I say take it back even further; Could the provisional government have succeeded? What if Lenin had died and Trotsky had lead the "Reds" and made them far more 'free' and 'democratic' without all the Stalinist gobbledegouk that was to come. What if the Tzar had managed to cling to power - is this even possible? (I doubt it)
And more importantly, what would Post WW1 eastern europe have looked like?