Idea of national socialist Russia believing in master Slavic race sounds interesting. And what claims would such Russia have upon world ? Every possible area where slavs lived from 5th century ? Or just Russian imperial borders + Sinkiang, Manchuria, Mongolia, Western Armenia ( Erezum, Trabzon ), Constantinople ( + Adrianople and Gelibolu ), modern day Polish borders, Slovakia, Bohemia and Moravia, Serbia, Slovenia, Bosnia, Bulgaria, Macedonia, Romania, Croatia ?
If you can put some work into this, it can be a nice optional addition to kaiserreich.
Just some suggestions regarding potential timeline - it would be much better to speed things a little bit- elections in which russian fascist gained about 35-40 % were around 1935 ( now just you need to find some interesting crisis which would force an early election - normal elections in kaiserreich Russia are in 1932 and 1937 - 5 election term in Russia + don´t forget about division of russian parliament into duma and senate ( which consist of imporatnt member of orthodox church, noblemen + other people appointed by president - in russian kaiserreich system president is elected by senate ). Next you can let assasination of kerensky happen like in normal timeline just with slight twist - add option that he survives, political crisis occurs and under pressure from right wing parties and organizations appoints Konstantiv Rodzaevsky as HoG on 30 january of 1936
And by the way Konstantin Rodzaevsky is already present in kaiserreich as potential HoG of Russian puppet - Manchuria.