I didn't go into how realistic this future map may be because it's essentially just fiction, but if you know anything about Russia's demographics you can say that it's very unrealistic, considering how with the current trends Russia won't be, well... Russian by the end of the century, much less capable of annexing anything - Europe has the same problem, but in Russia it is much worse
I think it's more likely for the country to fall apart with Muslim-majority parts breaking away, China annexing Siberia directly and what's left turning into something similar to giant Bosnia
And I live there