If Philip the Handsome dies childless - let's suppose that Joanna of Castile has almost the same problems as her sister Catherine, wife of Henry VIII of England - then who would get the Habsburg territories? Spain would be inherited by the Portuguese kings, because the next in line of succession after Joanna was her sister sister Maria, married to Manuel I of Portugal. But what would happen to Burgundy and Austria? And as Charles V and his brother Ferdinand are never born, who could become the new Holy Roman Emperor when Maximilian I dies? Any ideas?