Mary of Burgundy marries Louis XI
Since I worked on the Brittany-Burgundy union scenario, I think this wank is not ASB
Margaret of Scotland lives longer and dies on 1465, but the marriage was childless, then Louis XI decides to remarry and this time he courted Mary of Burgundy and married her and had a child named Philip who married Isabella the daughter of Isabella of Castille which starts a Valois dynasty in Spain and Spain is united with France for a while.