So, reading Apollinis et Dianae has had me tinkering around with the scraps of my Josef Ferdinand of Bavaria, Prince of the Asturias-lives TL (that never got finished since I didn't really plan ahead).
And it got me thinking, if JF gets Spain (presumably as Ferdinand VI or Jose I), what happens to Bavaria? Would it get split from Spain with a stipulation to say that the Bavarian Elector cannot be the King of Spain? Would it be stripped from the Wittelsbachs entirely as OTL?
And also, which parts of the Spanish Empire does JF get to keep (New World presumably?) Since I presume there might still be a lesser version of the WoSS. Austria will want Italy, France will want the Netherlands, and Spain gets to keep what?. And what would the political scene look like c.1700?
Also, I have ideas for him marrying a Portuguese Infanta (if only for the ridiculous dowry she can bring - see Catherine of Bragança's and how rich the Portuguese crown was in the 18th century), since she's neither French or Austrian.
First of all, glad that Valena and I have inspired you

. Second, here's a link to the Partition treaties from the Spanish succession site:
http://www.spanishsuccession.nl/treaties.html
As you can see, the only parts of the Spanish Monarchy that were to be divided were in Europe, the rest of the Empire would go with Spain. To Bavaria though, I can't see Jose Fernando being both King and Elector. he ended up with at least three brothers, so chances are the Emperor or the Imperial Diet would try to mandate that the Electorate should go to a second son. But without the rest of the European Empire, Jose Fernando would have a tough time eventually ruling Bavaria. Chances are if he is allowed to inherit, we'd see a repeat of Charles V's situation: a brother becomes his Regent in Munich and eventually becomes Elector.
But all these treaties, both ratified and suggested, failed to gain the support of Spain, so chances are Carlos II will repeat OTL and leave the entire inheritance to his grand-nephew, the Prince of Asturias. And considering how ambitious the Prince's father Maximilian Emanuel II was, he'll definitely accept the will. The only question is what the rest of Europe will do. Britain and the Netherlands, along with the Empire will probably accept the treaty, with France throwing a fit but at the same time aiming for a marriage alliance. After all the Bourbons were no strangers to marriages with the Wittelsbachs (le Grand Dauphin was the brother-in-law to Elector Maximilian, and his sons were first cousins to the Prince of Asturias).
As to marriages, I'm unsure about Portugal. Remember the situation within that country when Catherine of Braganza married Charles II: they were fighting for their independence with no allies (France having recently abandoned them in the Treaty of the Pyrenees) and desperately needed aid. I can't see Portugal providing a dowry of even half of what was given for Catherine. And, the only OTL Portuguese Infanta to survive infancy was Infanta Francisca Josefa, who was born in 1699. With an age difference of almost 8 years, I don't know if the Spanish would want to wait that long for her to be able to produce children. Of course you could have her sister Teresa Maria survive childhood (she died in 1704 at age 8, but I have no clue what killed her). Teresa would be closer in age to the young King, maybe close enough to be the next Queen of Spain.
Another highly interesting, to me anyway, pick is the exiled Princess Louisa Maria Stuart. She is the daughter of a King, albeit a deposed one and would bring the backing of Louis XIV, without having to marry a d'Orleans Princess. Unlikely to be sure, but a possibility none-the-less.