Personally, I don't see Russia rising in 3 years or even a decade, but I'm not the one responsible for European security. If the republicans were to win and Trump return, things could change radically for them and the risk with the new republicans might be a decade long from their perspective. If Trump ends up in prison and Biden is elected with a democratic congress Russia is done, they might as well pack up and leave after election day. They will be down for a long time with America, Europe and others actively trying to keep them down while the global market for petroleum crashes over the next decade and Europe becomes militarily strong and energy independent. China could pick on Russia all they want as far as Europe and America are concerned and if they want to hang onto their pacific east coast, they might have to focus more there in the future. If Vlad thinks Alaska should be Russian again, or Ukraine, I'm sure China thinks Vladivostok that they lost in 1870 should be returned to them too. If other republics in the region went independent (with Chinese support) then anything becomes possible... There is a Russian threat to Europe, but there is a rich imperialistic China at its weak backdoor too and they are eager to do business with Europe.
Russia's air transport fleet is deteriorating at a rapid pace and being attired by war, and it only has a couple of rail lines through Siberia with many vulnerable rail bridges across big rivers. There is a highway now, but it uses bridges too and there is a growing truck shortage there with spare parts and tires scarce. Even if they could land a regiment of paratroopers in a troublesome eastern republic, cars could be placed on runways to prevent planes from landing. It wouldn't take much effort to cut them off from European Russia and there are groups in several of those republics that might try, with some clandestine support. By the time the Russian military crawls out of Ukraine in defeat, there might not be much of it left and rebuilding it in a corrupt kleptocracy under sanctions with no money will be difficult.