More specifically, with a pre WWI PoD, how likely is the survival of the following Empires?
France+Algeria and Tunisia (rest of Empire inconsequential)
Japan+Korea and Taiwan
OTL Austria-Hungary with pre WWI borders and government mostly intact
OTL Russian Empire with its pre WWI borders and government mostly intact
OTL Ottoman Empire with its pre WWI borders mostly intact
These are all multiethnic societies tied to Great Powers (except the Ottomans, sorry but you guys lost that status), which ceased to exist even with the governments strongly wanting to maintain most of these empires. It would be interesting seeing these powers survive.