IOTL Henry, the Cardinal of Lisbon inherited the Portuguese throne following the death of his childless great nephew Sebastian in Ksar el Kibir. During his short reign, the old Cardinal-King wasn't able to clearly define a successor leaving Portugal as an easy prey to Philip II.
WI #1: Henry is elected pope before! Not implausible: he lived through 6 papal elections as a cardinal and there was even an abortive move to buy his way into the papacy in 1555 when he was one of the favorites.
Sebastian's doom is hard to be butterflied away. If anything, having his great uncle as pope would feed his delusion of being God's main general. He'll find a premature death in Morocco and the pope is going to inherit the Portuguese throne.
Now, my take is that this would change little. The old king will reign from Rome and appoint a regency but his succession will be left as blurry as IOTL. But...
WI #2: Let's imagine that the Pope becomes convinced that the fact that he inherited the Portuguese throne was a Divine Providence's sign that the Papal States and Portugal ought to be in personal union. He duly proclaims that every pope thenceforth would also be King of Portugal ex officio, ruling Portugal via a regency probably presided by the Cardinal of Lisbon. He seeks and probably gets the support from the Portuguese Cortes.
What would Philip II's reaction be?
Would he swallow the Pope-King's decision fearing excommunication?
After the death of the first Pope-King should he march into Lisbon before a new Pope is elected? The resistance might be stiffer...
Should he risk to anger the other Catholics by preemptively march into Rome to guarantee the election of a Pope that doesn't go through with his predecessor's agenda?
WI #1: Henry is elected pope before! Not implausible: he lived through 6 papal elections as a cardinal and there was even an abortive move to buy his way into the papacy in 1555 when he was one of the favorites.
Sebastian's doom is hard to be butterflied away. If anything, having his great uncle as pope would feed his delusion of being God's main general. He'll find a premature death in Morocco and the pope is going to inherit the Portuguese throne.
Now, my take is that this would change little. The old king will reign from Rome and appoint a regency but his succession will be left as blurry as IOTL. But...
WI #2: Let's imagine that the Pope becomes convinced that the fact that he inherited the Portuguese throne was a Divine Providence's sign that the Papal States and Portugal ought to be in personal union. He duly proclaims that every pope thenceforth would also be King of Portugal ex officio, ruling Portugal via a regency probably presided by the Cardinal of Lisbon. He seeks and probably gets the support from the Portuguese Cortes.
What would Philip II's reaction be?
Would he swallow the Pope-King's decision fearing excommunication?
After the death of the first Pope-King should he march into Lisbon before a new Pope is elected? The resistance might be stiffer...
Should he risk to anger the other Catholics by preemptively march into Rome to guarantee the election of a Pope that doesn't go through with his predecessor's agenda?