Another idea, to make it more interesting: the red indian country declaring a war to uinte inida under socialism, while the brown ones declare a war to uinte it under the benner of hinduism, Delhi joins the fray for fun, to counterballance the allies, nepal/kathmandu/Tibet can enter as well, creating one huge mess
All indian nations get cores on all of india if they win, Tibet may make a bid for dominance over buddhist territories (the 13th century Tibetan empire was quite big), etc.
Another event chain: Manchukuo:
Japan can devide to unifiy the quing empire, thus merging Manchukuo and the conquered quing. This new countrys leader, Pu Yi might decide to break free at some time (recurring event for every 5 moths or so after the fall of Quing for about 3 years) for Japan. Japan might let got, or might declare war. Quings can go isolationist, or expanisonist, gainig cores over conquered China if they win. Sorta Quing restauration, ala Russian event chain.
And, to make SA a real player: La Plata-Brazil war/alliance. The winner, or both countries may deceide that on the onseet of another world war, the SA people must unite, thus creating the United Provinces of SA, going to war/"diploannexing" the whole of the SA. This wolud create a country with about 150 base IC, a nice manpower, a heck of tech teams, and all little gained armies. Quite a nice counterballance for an expansionist CSA/AUS (should be, after all), and may have interest in Europe, particulary in taking revenge upon Kingdom/Carlist Spain. Italy coulds respond, etc,etc.
Maybe I'll get more ideas later.)