Like making Bavaria and Rhineland as seperate states?
Hitler probably gets as far as creating a greater Germany movement before getting politically ousted when France get's pissy over Rhineland rejoining a germanic federation and threatens sanction or forceful occupation of the region against gemanic reunification.
France thus becomes somewhat the bugbear of Europe for making its demands felt. Italy annexes much of Yugoslavia under 'peacekeeping' rationales that leave it alienated with all European powers with the exception of Spain.
Power blocs form with an Anglo-American world sentiment, a Franco-Soviet Entente, Germanic state isolationism (Switzerland, Bavaria, Austria, Czech) Prussia-Brandenberg evolves as an anti-french antagonist that brings Poland into its sphere of influence on more or less equal terms since each is threatened by a major power on its respective borders.
Imperial Japan eventually reaches a forced stalemate in China occupying the north and several coastal regions but never starts a global conflict.
The Cold War never forms in real terms since the world remains fairly mulitpolar, America opts to retain its isolationist stance and global neutrality, but along more anglo-american lines since Britain falls out of favour in Europe sometime in the 1950s America and Britain have a major face off with Imperial Japan over the fallout in China and Japanese milliterism that cannot be kept in check.
This creates a minor Cold War fought by proxy via the various Asian nations as a Pan-Asian ideology is pushed by Japan.
This form of imperialism dominates de-colonialism, as previously British and French colonies opt to switch their allegiance, or deepen them. Thus decolonisation is a lot 'harder' in many nations as the world powers need to maintain their Empires. Communism provides a greater appeal as an alternative power structure and becomes stronger in Asia Minor and parts of Africa and South America.
Soviet power grows to equal the world power blocks by the late 1960s when nuclear weapons enter the stage, of which the Soviet Union would quickly become the world superpower and a Russo-Japanese war is likely on the cards as WWII instead, being pre-emptively fought via the Japanese in China.
This becomes a very bitter conflict as the Japanese Empire falls apart, yet the nature of nuclear conflict forms a world opinion against future war and in the aftermath nuclear weapons are made illegal (even if many signature nations still keep small stockpiles for research. Like happened with bioweapons).
The fascist European bloc by this point has created one Europe, Scandinavia another, and France, Britain are marginally aligned together as counter-weights to the Soviet Hyperpower, while central Europe is still a collection of regional states.
America meanwhile leaves its isolationist policies following the collapse of the Japanese Empire administrating the pacific region.
This eventually creates the cold war more like we know it going into the 1970s and later 1980s, yet without nuclear weapons, and given that the Stalinist era will have been long over by now, the world may be more like today, where America is the emergent superpower against an entrenched soviet bloc from Moscow to Shanghai.
But who knows...? Total speculation.