Say that in some OTL, Napoleon manages to stay Emperor of France and the three of his brothers that became kings (of Holland, Spain and Westphalia) all stay Kings. Let's assume Napoleon dies as per otl in 1821, and is succeeded by his son who after a regency and brief reign dies in 1832 with no children. Who would suceed Napoleon II?
Going by salic law, the heir is Joseph Bonaparte, who is king of Spain in this timeline. Would he accept the throne though? A franco-spanish union would be a terrifying prospect. I can imagine him saying no to the throne though, realizing he just doesn't have the capability to govern both Spain and France.
If not Joseph then Louis perhaps? Though liked by his dutch subjects, Napoleon did of course depose him of his throne in otl. In this timeline he remains king of Holland, but Napoleon's trust in him may still be shakey, I could imagine him being removed from succession by Napoleon.
Who then, Jerome? I know almost nothing about his and Napoleon's relationship or his capacity as a monarch.
What do you think?