Lenin was part of the story, especially his brother's involvement in A II's death. Other than that, he really does not show up much until the end.
A docudrama on Lenin would be another story altogether. Same with Stalin, but I think that has been done.
IMO, this should not get too involved in the political developments in Russia. Of course they must come up, as well as the war and revolutions, but to keep attention, the focus should remain on the family and their interaction with each other and the European royal scene. This was and "end of an era" drama Tragic as the real end was, it was historical fact.
I have recently heard of a docudrama of the Miloslavic rule, but starting with Tito. That sounds boring as, well, toilet water. And I mean the flush type.
Have no idea about much of that is going to come to realisation.
So a project of this type would need resources in all directions. Especially writers and other talents.