Come on /bant/ - Denmark tried the whole empire thing already, ages ago... it's a bad idea.
Empires in general suck, those colonized never like their "owners", and the colonizing powers become arrogant and self aggrandizing.
England, Spain and Denmark have each had a go at the empire business and been toppled (rightly so of course) and have thus be taught an important lesson in humility.
Alliances, yes please, those are nice.
Empires, no thanks.
I'd be all for a Scandi/Poli/UK commonwealth, we do have some cultural similarities, we're close by each other and we've all been humiliated by bigger powers and may therefore become quite responsible and kind.
Yeps, pic unrelated.