Sounds like a good idea. There should be a throne to be created for:
- Emperor of Angevin
- King of Britannica (since Britons = Brittany)
- King of Celts (united Scotland + Ireland + Cornwall + Wales?)
I want to be as historically plausible as possible though, and it appears that you can't split a kingdom over two different empires. Thinking along the lines of:
Britannia - England, Scotland, Wales, Ireland, maybe recreate the Isles form DVIP?
Francia - France, Burgundy, and the Low Countries (Lotharingia) - maybe recreate Aquitainia from DVIP?
HRE - Germany, Italy
Now my problems with the above is that I think I'd be cool to have in place a Celtic empire for the British Isles, and one for an Anglo-Norman one (Great Britain/Angevin - but the latter is the name of a dynasty, which runs into plausibility problems).
Spain - Castille, Leon, Navarre, Aragon, etc.
Polish-Lithuania (want to think of a more natural name for it).
Rus needs to be an empire, and have 3-4 kingdoms inside it.
Kalmar Union? But want a non-anachronistic name for it.
Africa needs work with a Fatamid empire and an Almoravid empire.