I also got some ideas
1. Maybe an event that does not have a non-core province production penalty? Maybe on the American or the Antarctican map? It would certainly allow more warfare to happen as more resources are gained by capturing others provinces and generally making the whole map more active.
2. A African or South American map (like you got the American Homefront, why not the African or the South American continent)
3. A Cold War event ( this would be a bit hard to develop though, I'm having an idea like you can support puppet states to help you attack other puppet states by the different army? Maybe you can give research, resources, army, to the puppet state?)
-You can't attack the other countries core province
-You would have puppet states on different areas of the world (puppet states are AI)
-there would be a 'battleground' and in each battleground, there are puppet states fighting from each playable nation
-You can convert your army to one of your puppet state by moving your army to their provinces and 'converting' it, like the paratrooper conversion
-You would need to research a certain type of army, before 'allowing research' in the puppet state, maybe a 2nd page, and both needs the same time
-You can give any amount of resources to any of your puppet states, but they won't give it back to you (or maybe you can demand them?)
-You can't control puppet states
-Puppet states would give share map to you
-Puppet states are constantly in war with other puppet states
-Some countries that are playable maybe S.U./ USA/Japan/China/UK/France/Germany (would it be too much)
-There are vps ONLY in battlegrounds and those who gain the most VPs wins
-Puppet states in one battleground can get the army to cross to the other battleground to gain land
HAHAHA I'm too serious on it am I not 