Very interesting concept, is the first release on the horizon? Take a look at Mod33, I think they have democratic Germany path, could be some great events or just inspirations to take. Also, maybe Kaiserreich could give you some inspiration on Royalist China? I'd be careful with fascist France - it doesn't sound realistic, unless you're very good AND realistic with explanation. France might have bigger problems with communists, with maybe possibility of a coup, but fascism? EDIT: Just remember, among other thousands of things, Mod33 also has fascist France path, maybe take a look at how they justify it.. the modders of it themselves are french, so they maybe have realistic path. As for Polish-German relations, well, I'd suggest checking them in 1920s, before Hitler, during Weimar - I think they weren't good then, so to assume that they might be so good to even trade territories, well..I don't know about that..
Things that just come to my mind, of what would happen with democratic Germany.
- Germany goes more or less isolationist. Well, actually not isolationist, though less coherent foreign policy for sure. Military cooperation (in secret, behind Allies backs) with Soviet Union would continue, not end with Hitler coming to power, but maybe lets say with Stalins purges. Not huge cooperation, but enough to allow Germany to keep in line with techs, like maybe tanks, planes, etc.
EDIT: without this cooperation German air-force and mobile warfare stuff should be either non-existent (Versailles treaty forbid Germany having air-force) or ridiculously out-of-date.
- Without Hitler Germany's army would grow far slower, since democratic Germany would take far more careful and smaller steps in going against Versailles limitations. Part of German population might be upset by re-militarization of Germany.
- Even without Hitler there would be fascist sympathizers in Germany - many of them, in fact - since Germany's former autocracy and pro-military culture would be - as history showed - hard and nearly impossible task for democracy and democratic values to crack.
- Germany would have some other consequences of Great Depression - if not coming of Hitler, then some other problems, don't know though what exactly. A usefull read would be -
http://en.wikipedia.org/wiki/Weimar_Republic#Golden_Era_.281923.E2.80.931929.29
http://en.wikipedia.org/wiki/Weimar_Republic#Institutional_problems
- With Germany weaker and far less revanshionistic (though still, it would have plenty of revisionist sympathizers, especially with Austrian support - though not to the level of civil war, or at least I'd doubt it), its possible that Allies would have harder time keeping their alliance intact. For example South Africa could distance itself from it so much that in case of major conflict it wouldn't involve in it.
- With Germany seeming to be weak Poland might feel strong enough to start push Germany around with aggressive attitude, though I at this point cant come up of strong enough reason for them to actually go to war.
- With Poland being more secure about its western borders, it might be aggressive enough to attack or at least threaten Czechoslovakia for Český Těšín (very close to, but more aggressive then historically). Also, for the same reason (nearly non-militaristic Germany), Poland might be cocky enough to actually attack Lithuania, as it threatened to do historically, with the ultimatum in 17th of March, 1938. Poland might be duplicating - like somewhat historically, and partly for other reasons - the aggressive interventionist stance that Italy and Germany historically had against its neighbors. However, if Poland would be too aggressive, the Baltic Entente (the large version of it - Finland, Baltic States, Poland, Romania) would never work since other countries wouldn't trust it. But if Poland would be just "moderately aggressive" (lets say attack Lithuania - since Lithuania was the main obstacle in the creation of Baltic Entente - but not occupy it, lets say just make it puppet state - with very high dissident in such case, but puppet state nevertheless) then Baltic Entente would happen and Soviet Union would have to face lets say Baltic States+moderately aggressive minded Poland.
- Czechoslovakia and Germany might be good or very good friends in this scenario - both being democracies with difficult inner politics.
- With Weimar intact Germany would still be paying - though, thanks to its stubborn anti-reparations stand in reduced amounts - the war reparations to western allies. There might be some nice events were German population is against doing the current payment (which lets say reduces huge amount of money and/or resources), but government is for them.
- Some kind of events for Germany to start getting again being militarized. If historically it was only with Hitler - and even then it took some time, for Germany to go beyond all the allowed military limits of Versailles treaty, then with Weimar still intact I don't think Germany should start building units before.. 1938? In game all units should be disabled for Germany, lets say except militia, infantry, transports, escorts, convoys, and buildings, and player would get some warnings, if he would build too much of infantry. So until getting or causing events to unlock unit builds, he couldn't build up any kind of serious forces. Aggressive Soviet Union (war with Finland, occupation/war with Baltic States and/or Poland, occupation/war with Romania or just if Soviet Union would have build army bigger then X divisions) would be one of event chains to unlock it. Also, heavy peace-time modifiers. Example were something like all this has already been done with a state - USA in TRP mod - at start almost no production, no units production and heavy peace-time modifiers with dissent.
EDIT: Instead of directly breaking militarization limits set by Versailles, Weimar Germany in this scenario might invest heavily into rocketry and starting from ~38-39 - into nuclear tech. Since Weimar didn't forbid research of these techs, Weimar might focus on these. Also, it would probably try have its 100'000 troops (the amount allowed by Versailles) to be as up to date and experienced as possible.
- Non-militaristic Germany could mean Soviet Union, in the historical "debate" of ~1938 of "should we focus on east or west more" could choose east. Historically it chose that Germany was larger threat then Japan, even though it thought very tempted to attack Japan and occupy Manchuria - especially after defeating Japanese in the battles of Khalkhin Gol, etc.
- With Germany more or less "sterile" and Manchuria not under Japanese, Soviet Union wouldn't have too good reasons (I might be wrong) to involve itself with Far Eastern conflicts. In fact, if Japan hasn't conquered Mancuria, then there's little point itself to wish to occupy Soviet Far East at all. So, is the idea of having Manchuria non-Japanese a good idea? And is there a good explanation of why there is such divergence from history in this part of the world?
- With Germany being democratic Maginot line would be either weak or non-existent. And Ruhr region would still be under french control or it could go back to Germany under different circumstances. French, British, Benelux could all have smaller armies. And those armies might be too small for the hungry Soviet bear..
- With Germany being peaceful, Soviet Union might feel more cockier and "secure" (as much as paranoid totalitarian regime can ever be

)
- All countries should have weaker tank tech. I think Germany was the leading force in Blitzkrieg and Tank technology historically (necessity to rethink drastically the war doctrine caused it - "Germany can't win long war, so quick war is a must"), and without it leading the field, it should go slower. Tanks, like in TRP, should NOT be buildable by ANY country, until lets say medium tank tech is researched PLUS adequately high doctrine. Until then - only as brigade (like all countries had historically until Nazi Germany proved otherwise). So, Germany's doctrine should also be the same as Allies. In TRP tanks are unlocked only after Germany (the only country in TRP besides Czechoslovakia to have tank divisions) goes to war and "shows the world how its done".
- Weimar's foreign policy in some way might be similar to modern Germany's - whatever happens, just don't touch us, we don't want to feel and be threatened in any way. For Weimar in this scenario that would be because - inner political situation is unstable enough. In case democracy would fall in Weimar (lets say dissent 50%), it could be the pro-fascist or pro-monarchistic military (some inspiration from the fascist, monarchistic Germany paths in Mod33 could be taken?) who'd take the charge/make a coup. And Prussian militarists might be the central force in such a coup. Though historically, it declined in 20-30s, with Nazi party taking hold on most militaristic feelings of the population. So while weak, German democracy could probably avoid that and survive.
- With Germany military weak, Soviet Union might get far into Europe in case it starts its "exporting revolutions" tour-trip.. Also, with Germany keeping democracy Soviet Union would have less problems keeping German communist party active.
- With Germany seemingly out of question [though, some comparison could be made with modern Germany here - even though modern Germany is democratic and culturally thanks to de-nazification and de-militarization - very non-militaristic, over time it has made and currently maintains a large, modern military and has one of the highest defence budgets in the world] and Japan - as far as I can understand - being not too anti-USA, it would seem that USA has good chance to stay neutral in this scenario. So USA's military should grow very slowly.
- No German involvement in Spanish civil war. Or, even better - German government supporting Republicans, while some German non-governmental, radical organizations sending support to Franco.. would make interesting choices for players. Maybe with Axis (in this case - Italy, Austria) involving itself more so in Spanish conflict, then happened historically, Franco would be more inclined to join Axis then he was historically? So that would strengthen Axis in game abit.
EDIT:
- If France would feel that defense is not the only option (and wouldn't be building Maginot line, which represented this fear of revanshionistic Germany), it would probably be more active in Spanish Civil war and try to play a role against Italian aggressive policies.
- In case of Winter War Germany would almost certainly support Finland - they had good friendship historically, and it was great surprise that Germany showed no wish to help them when Soviet Union attacked. Of course, historically this was because of Rib-Mol pact. In democratic Germany scenario its hard to imagine having such pact between Germany-Soviet Union, so Germany would probably send supplies and probably 1 division to help the fins.
- Also with democratic Germany, there would probably be better relations between Germany and Estonia and Latvia, then there historically were. They could be good enough that Germany would guarantee their independence. Historically Germany and Soviet Union used Lithuanian-Polish conflict to distance Lithuania from Baltic Entente plans, so it wouldn't happen. In case of democratic Germany I'm not sure of what relations might be between Germany and Lithuania, but its worth thinking about.
- Even with democratic Germany it would probably not become part of Allies unless it's loosing its own land.
- If there is friendship between Austria and Hungary in this scenario, then Hungary's wish for revisionism and conquest of lost Hungarian lands would be fulfilled sooner. Slovakia would probably become Hungarian puppet.
- With Axis Austria its goals should be well thought out - historically Axis powers were revisionists - the ones wishing to revise results of WW1. So what does Austria wants in this scenario? Repairing all Austria-Hungary? If Austrian fascism is nazi-like, then unlikely, since then it would be heavily german-centric. So, maybe regaining all german-speaking lands of Austria-Hungary? Or merging of all German lands? But realistically Austria couldn't be strong enough to control far larger Germany. It might be strong enough to beat Germany and set up friendly fascist government there and while occupation of Bavaria or part of it might be justified, occupation of all Germany would be far too unrealistic. Maybe setting direct puppet of Baden-Württemberg would also be not too unrealistic.
http://en.wikipedia.org/wiki/Weimar_Republic#Constituent_states
- While Nazi Germany did wish to create new world order, overthrowing the supremacy of Western Allies and conquering Heartland in the east, what would be the great Austrian goals? Also reforming world order?? Seems far fetched. For example Mussolini hoped to "recreate" and re-conquer Roman empire. There are couple of mods exploring the idea of re-emerging Austrian power as fascist, as democratic, as monarchic, etc. Maybe some ideas can be found in them.
- As far as I can find, Polish-Italian relations were good during second part of 30s, so Poland should have possibility to either join Axis alliance or form its own alliance with Baltics, and maybe Finland. If so, Poland should try to tempt Romania to also join it, since historically in 1939 they had unactivated defensive alliance and very good relations in general.
Ok, thats quite enough. I do hope some of the ideas you'll find useful, and sorry for the long post! Good luck with the mod!
EDIT2. Maybe some ideas here you find usefull:
http://althistory.wikia.com/wiki/Weimar_World
http://www.alternatehistory.com/discussion/showthread.php?t=142825
http://www.alternatehistory.com/discussion/showthread.php?t=15985
http://www.alternatehistory.com/discussion/showthread.php?t=149948
http://www.alternatehistory.com/discussion/showthread.php?t=15985&page=72