IMO, Russia should not get involved in Venezuela. Maduro is very unpopular right now, mostly as a result of his own blunders. Supporting Maduro in any kind would make Russia unpopular with the general population.
And that Russia has ever been a favourite? The Russians have always supported the unpopular politicians. Where Russian there's always poverty and hunger. I hope the Venezuelans understand this and not only overthrown Maduro, but you can never choose the candidate supported by Russia.