They had the thought that if Leopold didn´t want the throne of Spain Friedrich Eugen should take it. But he didn´t want to.
How interesting would that had been:
King Friedrich Eugen of Spain with Queen Louisa
King Miguel II. of Portugal with Queen Elisabeth
and if the plan had worked a King Friedrich Christian of Poland with Queen Elisabeth Helene
Three Thurn und Taxis Queens! A pity it wasn´t so.