Or Russia's government is overthrown and the people in charge want to consolidate power rather than focus on a war
Overthrown Russian government changes little. A huge majority of Russians have the ideology that Ukraine doesn't exist (or should not exist) and this means that the war will continue. It may merely temporarily deescalate. Russian culture, as it is, is incompatible with Ukraine.
Whatever you say. I don't believe you.
I could write walls of text about contemporary Russian culture and ideas. About Russian history curriculum in Russian schools. About modern Russian music, including non-mainstream artists. About modern Russian cinematography with marvelous TV-series. About modern Russian literature and selective popularity of Russian classical literature (which is usually twisted and misinterpreted). Show how Ukraine and Ukrainians portrayed in all of the above. Then do the same for the art of the Soviet period and show that it isn't something new, it merely became worse.
I won't. I'll merely express my personal opinion that Russian culture (as it exists now) is incompatible with the idea of any independent Ukraine and restrain myself from trying to prove the validity of my opinion. You are free to believe whatever you want.
One saving grace is that many, many young Russians prefer anime and Netflix to all of that, so the hope is not entirely lost but it won't shift the culture quickly. Also, I expect something like the Great Chinese Firewall of Russia soonish.