What would be the effects of a surviving House of Valois. Perhaps Francis II has a son with Mary Queen of Scots, or Charles IX's daughter is a boy and lives longer. Perhaps Henri III manages to have a son, or Francis d'Alencon marries Elizabeth I and they somehow have a son. Earlier on, maybe Mary Tudor has issue with Louis XII. I'lo go for Charles IX having a son, let's call him Francis III. What effect would this have on France and the world?