No no no
Imagine a scenario that WWI ends in late 1917 or early 1918 after a even worse Nivelle offensive and Brest Litovsky treaty
Russia is pushed from Poland, belarus, Finland, the baltics, ukraine + Crimea, Georgia, Azerbaijan and Armenia
Could Russia retakes all this land through a war later? Since Russia was at civil war in 1918, you can choose which side wins and if that side would be capable of taking this gigantic task
France collapses, the UK withdraws and accepts German hegemony, and Russia is left embroiled in a civil war; that's what you mean by the conclusion of WWI?
The Russian Civil War raged for nearly five years, further decimated the country, and left Russia in dire straits for some time afterwards. This is without much foreign intervention which I can't see happening with a victorious Germany. It's in Germany's interest to keep Russia weak and I can see them buttressing Ukraine and the Baltics against future Russian encroachment as well as possibly aiding the Whites if for no other reason than regicide. The very fear of the future Russian threat alone may be enough to keep these lands tied to Germany for the forseeable future and the benefits they offer economically would only strengthen Germany in the ensuing years. Couple that with the 'rising' threat of Japan to the East and Russia will find itself hard pressed when it manages to finally get its act together. Will it devolve to warlordism like China? No, but whoever wins will have an exhausted nation as their prize. It would be in the victor's best interest to enter into some agreement with Germany if only to rebuild their shattered economy rather than to risk yet another general war.
So if Germany wins WWI, they let the Whites do the majority of their dirty work (would the Germans really want to keep fighting after four bloody years?) with excess military equipment left over from the Great War while gradually tightening their grip on their new territories. And when the war finally ends, Germany is likely the only nation left to help them rebuild (The UK abandoned them, France is broken).
Could Russia ever threaten to retake these lands? After a generation of separation, and supported by Germany, I don't think so. Economic, cultural, and military variables just make it seem impossible.