So this was my first idea when i discovered Alt history. Is there a way to make Africa dominated by a single Spanish (or Iberian) power? I don't know nearly enough of the contextual history, how strong the Ottomans were or why Portugal and Spain are distinct countries.
I'm thinking of the Portuguese empire, and how they had circumnativgated the continent. So if there is a way to keep Spain and Portugal unified (and keep their other holdings), would it be possible that the Reconquesta would just keep going? POD can be very early back, if a different set of monarchs are needed.
Anyway, thoughts? PS: i realize that the defeat of the Spanish Armada might be a good starting point, but i have no idea the implications.
EDIT: I would be entirely fine with a surviving Al-Adonis spreading Islam as well. Heck, Spain has been so many things that you could wank them in infinite directions.