The only way this could happen is if the Allies negotiate a peace. This is likely to mean no US entry and a tightening of loans to force the end. So basically, West front sans AL for Germany, no international colonies, and Eastern economic colonies. Not ideal, but much better than OTL. Austria-Hungary falls apart and Germany might even gain rump Austria+Sudeten while holding down vast lands in the East. It might be wise for them then to seek accomodations with the Whites by giving up Ukraine and maintaining the Baltic and Poland-Belarus (I assume a union to increase the viability of the country). OTL the Allies used German forces in the East to maintain the cordon of the Bolsheviks until the various national groups could defend themselves. Additionally, the war in the East kept going for years after the end of WW1, so even if Germany does get to keep anything, they will be bogged down in a vicious struggle with the Poles, Balts, Russians and just about anyone with a gun. On the plus side for them, there won't be a power supplying them will training, weapons, and a safe haven (that is assuming the West is not full of dicks, but even if they are, they can't get into the Baltic, and anything that they send via the Black sea is likely to go to the various warlords that were called the Whites)
Actually I am planning a TL kind of based on this idea, but it will take a little while, I have a lot of research to do, as I want to make it truly epic.