During the WotSS, whilst Philippe II, duc d'Orléans was campaigning in Spain, he attempted to conduct negotiations with the Allied Commanders, to find out if the Allies would be more agreeable to him replacing the duc d'Anjou as the French-backed candidate for the throne of Spain. Needless to say, when word of this got back to Versailles, Philippe was in disgrace (and never commanded an army again) and recalled home.
Would the Allies have been more amenable to his proposition?
How might Spain have reacted to his distaste for religion and his goings-on (the Regence court was considered one of the more scandalous of the age)?
And if the Allies had agreed that he was preferable, how would his uncle/father-in-law, Louis XIV feel about this?