Well suppose the Germans do this invasion of Sweden (when would they do it, autumn 1914, or spring 1915? dead of winter 1914-15 seems highly unlikely, and can they spare anything though before November 1914), and Norway DoWs the Germans. Well, then the Germans have really stepped in it diplomatically speaking. Obviously, it seems like this wouldn't happen without a tandem invasion or Denmark.
Midwestern opinion in the US won't be so isolationist, you'll have bar fights breakout in Milwaukee and Minneapolis between ethnic Germans on the one hand and ethnic Swedes, Danes, and Norwegians on the other.
But how extensive will be the territory the German's will be able to occupy in their initial campaign? Will they have a solid hold up to the Kiruna mines? Will they be able to break out to the Norwegian coast or at least take Oslo
Would the Germans be able to hold their peak territorial extent in Scandinavia for a full year or two or three after the peak of their initial invasion? Or will setbacks/distractions from other fronts, local resistance, and Anglo-Canadian-Russian reinforcements start rolling the Germans back in Scandinavia?
Could the campaign end up as a total bust for the Germans, with them thrown back into the sea from any lodgments in the Scandinavian peninsula or Danish islands? If so, is there much mutual destruction of fleets while this is sorted out, and possibly a viable British supply line via the Baltic to Russia afterwards?