As always I enjoy different takes on how the Great War might have been altered, I am following your thinking with great interest!
So are you having a conservative French government assume power post-war with the left resurgent by the 1930s? My read is that the French right was smaller but by no means impotent and the left was quite divided. Does your Kaiserreich see coalitions between the Liberals, Socialists and Zentrum with the Socialists growing in influence as well as moving Centre / Centre-left? If so, do you see the French socialists warming to German Social Democrats, thawing relations over time?
I agree that Germany would attract, fund and hold some amazing scientific talent, thus I foresee them getting the atomic bomb first, but I am dubious if they use it first, in fact I can foresee them never being used in anger once a "cold" war settles in. By 1941 Kaiser Wilhelm I is dead, Prince Wilhelm seems far less adventuresome outside the bedroom than his father, and if the future Wilhelm III dies in 1940 (call it fate), then one can only speculate how Louis Ferdinand might behave. I am hopeful for the erosion of power for the Kaiser and greater power in the Reichstag, Germany would see atomic weapons as strong deterrent to Communist aggression but without more I see no reason for Germany to run afoul of America aside from trade issues. But I look forward to your paths taken.
on French politics it's very complex and strange world
was is Labeled as Liberals, Socialists and centrum are quite different politic
What surprise me was how unstable the
union sacrée "Great union" was during WW1 with six Prime minister in succession.
After loosing war the union sacrée break apart into numberless fraction of political parties and changing coalitions.
just like the OTL Weimar Republic, but with major difference: a majority of them are left political spectrum.
Yes there will be Center, conservative, nationalist, but only rare extrem far right parties without power.
In this environment and economic crisis the Communist rise far easier to power as a "french NSDAP analog"
But that not imply that Communist win easy, they will use same methods like NSDAP to get in Power.
there brutally, in combination of french anti-Semitism will let to french jews to find refuge in German Empire
like Aircraft designer Marcel Bloch who find at Heinkel Flugzeugwerke new job he will change his name in Marcel Sturmer
and build the Jet fighter "Donner 3" in 1960s
in OTL Marcel Bloch change his name in Marcel Dassault and design this plane as "Mirage III"
On Succession of German Throne
Wilhelm II (center) dies in 1941, follow by Wilhelm III (Left)who died in 1951, planned was that grand son Wilhelm IV. succeed (right)
But in OTL 1933, He renounced any rights to the succession for himself and his future children to marry Dorothea von Salviati.
His grandfather Wilhelm II did not approve of the marriage and ITTL exclude him from Family. (Analog to Wallis Simpson Prince Edward,)
Follow by his brother Louis Ferdinand as Emperor of Imperial Germany (analog to King George VI) while grand son Wilhelm died in ww2
Louis Ferdinand I. was educated in Berlin and deviated from his family's tradition by not pursuing a military career.
Instead, he travelled extensively and settled for some time in Detroit, where he befriended Henry Ford and became acquainted with Franklin Delano Roosevelt, among others.
He held a great interest in engineering. Recalled from the United States upon his brother's renunciation of the throne, he got involved in the German aviation industry,
He will be a key figure in WW2 in German Air force effort while Göring rots in a in Belgium military cemeterie.
in 1951 he become next Emperor of Germany. usher a new era in German Empire: the "Wirdschaftswunder" and "Fortschritt durch Technik" and socials reforms.