Vitruvius
Donor
I would think that Louise Christine's youngest sister Marie Hedwig would become a much more desirable bride once her sister becomes Empress. So she is likely to marry someone more important than the third son of the Duke of Saxe-Gotha which may create another important relation. Maybe to Christian of Denmark, John George of Saxony or second wife to the Great Elector just off the top of my head. If James of York hasn't married Anne Hyde that could be an interesting match (though I'm not sure how likely it would be in any event).