[quote=@Unfortunately]
Don't know whether to decide for a shrunken unified EU or a Fourth Reich.

The picture shows Brussels as the capital, so that's the EU one.

Personally i find the Fourth Reich a more interesting option, but damn if it would trigger anybody.
[/quote]You may also try to think of a less typical idea. Both the EU and Fourth Reich are overdone, IMO
Given that you mostly control Germanic territories you could establish something with that theme. A Neo-Barbaric nation could be fun, too.