I like the 2022 Russia method, seems to fit better with the conceit IMO. They get gobbled of course.
Maybe, but I'm tempted by a rosier outlook. 2022 Russia will have its work cut out for it simply digesting its "new" territory within 1914 Russia's borders as well as trying to adapt its economy to the global situation. It could go further, but to what end? After hauling some ambassadors out to witness the nuking of some uninhabited island or something, all the other powers will have no choice but to accept the new superpower. Russia's tech will degrade while the rest of the world races to catch up, but it will still take a few decades. Maybe a few decades of being sole global superpower will mellow Russia out some. If not, then things will get dicey once the rest of the world starts getting close to catching up. But if civilization-ending nuclear war is averted then I don't think it'll end up worse than our history in the long run; faster development, kill smallpox, polio, etc. earlier, etc.
2022 Russia can wreck any army in the 1914 world, but doesn't have the manpower to meaningfully overrun the continent. Sigh, unless Putin just decides his entire nation is going to be the world's biggest pirate. I think that poor economist of his would commit suicide on the spot.