Putin's drawn out murder of opposition figure Navalny may be another step towards his end. But as Mikhail Khordokovsky wrote in November 20323, what comes next will depend greatly on how the West reacts.
Collapse of the Empire, resulting dozens of Republics modelled after Kadyrov's Chechnya, is dangerous undesireable. As is a mythical "Good Tsar", who would inevitably continue the corruption, aggression and expansionist tendencies.
https://koerber-stiftung.de/en/projects/the-berlin-pulse/democracy-in-russia-is-possible/
From @openDemocracy, a counter to Khordokovsky's vision, which is only touched on briefly in the above article:
https://www.opendemocracy.net/en/odr/khodorkovsky-book-kill-dragon-putin-revolution-russia/
"There is literally nothing in the book about the work of opposition politicians with the apolitical majority of Russian citizens." Which is he key problem regardless of who the opposition figure is, or if they're martyred.