So I'm surmising that the consequences of the aftermath of the Great War still effects and displaces millions, the Great Depression still occurs. This still equates to a sociological divide throughout the world - i.e. Growth in Socialism, Fascism (Although you state no Hitler, there still might me an influencing Nazi Party.... Mussolini unfortunately still comes to power, although without Hitler pissing in his pocket, his taste for conquest is curtailed), Nationalism and Communism still occurs.
Would there be a Spanish Civil War on the scale it occured?
If there's no Hitler, one would assume the Weimar Republic would continue and with that perhaps greater natural convergence with the Soviet Union for both trade of natural resources, and of course military technological experiment and development (Treaty of Rapallo & Treaty of Berlin) as a consequence of the Russian Revolution/Russian Civil War and the Treaty of Versailles, not to mention Germany's want to ensure a divide between Britain and Soviet Union.
If the Weimar Republic continues without Hitler's idelogical crap, I'm wondering if German would side with China rather than Imperial Japan? After all the Weimar Republic showed it's willingness to supply/equip and train the Nationalist Chinese government/military....
Could the Weimar Republic attempt to regain its lost colonies, taken from it as a consequence of losing the Great War?
Could there be a resurgence of British/US tensions, as a consequence of economics, the Great Depression or US ambition of empire building....
I do like the idea of a developing and mature Czechoslovakia, what with the growth in capability and reputation of Skoda, Ceska Zbrojovka, Avia, .....
MAD