Inspired by a quote of Susano in this thread, about the possibility of Philip the Handsome dieing childless: https://www.alternatehistory.com/discussion/showthread.php?t=101935&highlight=philip
IOTL John of Asturias' child with Margaret was a stillborn girl. WI the child had been a boy and survived, while Philip the Handsome and Joana had remained childless? We would have Burgundy under the House of Trastamara, but would Austria be included in this Spanish Empire? And who would be elected as Emperor when Maximilian dies?
Well, there's his sister, Margaret of Austria, but IOTL she had no children. Interestingly enough according to Wiki she did get pregnant by John Prince of Asturias. If that child (stillborn IOTL) has survived, while Philip has no sons, we could see Austria-Burgundy and Spain united - under Trastamara!
IOTL John of Asturias' child with Margaret was a stillborn girl. WI the child had been a boy and survived, while Philip the Handsome and Joana had remained childless? We would have Burgundy under the House of Trastamara, but would Austria be included in this Spanish Empire? And who would be elected as Emperor when Maximilian dies?