multiple options because of the lack of Margaret of Austria - that frees both Charles and Juan of the Asturias up
On the other stuff -
Francis II's wife died in 86 and he died in 88 - so a very narrow window of opportunity for a third wife unless you are going to have him live longer (he was 55 at his death so he hasn't got that much longer_ - it is interesting given his succession issues that he didn't rush to the altar - though the estates confirmed Anne as his heir in the same year as her mother's death.
For Anne to marry Philip you need Brittany and her father not to lose to the french and sign the Treaty of Verger (which essentially allowed France to dictate Anne's marriage) - the French used the treaty to force her to repudiate her proposed marriage to Maximilian in OTL and marry Charles.
Catherine of Navarre's mother opted for d'Albret in part because it helped her avoid the pressure on her to accept Ferdinand and Isabella's offer of their son - thereby reuniting Navarre and Aragon. It also appealed to some of the people she needed on side in the civil war with Catherine's uncle (who had claimed the throne of Navarre as the male heir - he would be the father of Germaine of Foix in OTL).
On the other stuff -
Francis II's wife died in 86 and he died in 88 - so a very narrow window of opportunity for a third wife unless you are going to have him live longer (he was 55 at his death so he hasn't got that much longer_ - it is interesting given his succession issues that he didn't rush to the altar - though the estates confirmed Anne as his heir in the same year as her mother's death.
For Anne to marry Philip you need Brittany and her father not to lose to the french and sign the Treaty of Verger (which essentially allowed France to dictate Anne's marriage) - the French used the treaty to force her to repudiate her proposed marriage to Maximilian in OTL and marry Charles.
Catherine of Navarre's mother opted for d'Albret in part because it helped her avoid the pressure on her to accept Ferdinand and Isabella's offer of their son - thereby reuniting Navarre and Aragon. It also appealed to some of the people she needed on side in the civil war with Catherine's uncle (who had claimed the throne of Navarre as the male heir - he would be the father of Germaine of Foix in OTL).