User blog:Fegaxeyl/The Anglo-German Union

Right, so I'm adopting the eponymous timeline from Gamb1993 (assuming he's still active and allows it, in which case, there'll be some other complications). For those of you who haven't checked it out (link here) it postulates the unification of the British and German empires in 1901-02, with Wilhelm II of Germany taking power. How do I intend to expand this timeline, and what suggestions do you guys have? Any more ideas, people?
 * World War One:
 * The Schlieffen plan would be a full-on invasion of Belgium (and possibly the Netherlands too) designed to create much faster access between the British and German bits. A successful capitulation of France would then make them cede territory north of the Somme river.
 * The war with Russia would again take a long time, but again result in an Anglo-German victory. Communism's rise would be questionable.
 * The existing timeline posits a rise of communism in Spain. I feel that if it were to rise there it would probably also appear in a defeated and embarrassed France.
 * Rest of history
 * Anglo-Germany and America would probably grate against each other. Wars in the Pacific and Atlantic could result.
 * The effects of combining the British navy with a Prussian army would mean that the union would be extremely powerful on the world stage.
 * The Netherlands could be annexed too.
 * Communism would be spread globally by the colonies of France and Spain.
 * The main problems facing Anglo-Germany would be cultural differences, especially if (as in OTL) monarchy and nationalism lost its importance throughout the 20th century. It may have to become so kind of federalised state to more fairly represent the different cultures within it - Irish, Scottish, Welsh, Cornish, English, Dutch, French, the various German nations, Polish, etc.
 * The alternative would be the evolution of an interesting fusion of north European cultures to create social cohesion; this may be something of a philosophical obsession in the first half of the 20th century.