I think the forces unleashed by the Reconquista after it was completed are necessarily highly orthodox Roman Catholic. If you change the Reconquista you might change what forces are unleashed but if you delay the Reconquista then it's possible it never finishes because of the Ottomans helping Granada or no Isabella. If you make an earlier Reconquista completion you might change the forces unleashed but then it would be too early for a Reformation.
However the forces unleashed by the Conquista of the New World might take things in a different direction and I'm interested in hearing more of your thoughts on that.
Well, Conquista was largely perceived as a prosecution of the Reconquista. Many historians underline that Columbus sailed the same very year Granada was taken.
The Discovery caused a great theological debate in Spain. many clerics saw the New World as a literally New World, where a new and purer Christianity could be built upon the good and innocent, even if pagan, Natives.
Vasco de Quiroga was the most important among them, but many Franciscan missionaries took a similar path in Mexico and later on elsewhere.
All them had been strongly influences by Erasmus, More and Vives and sought for a reformed Church, but their idea of reformation was totally different from Luther's upon the two key ponts of free will and unity with Rome.
Quiroga used More's Utopia as a framework for the native communities he was sponsoring in Michoacán; his copy of More's work had been given to him by Zumárraga, the archbishop of Mexico.
Those clerics had support in the intellectual circles of the university of Salamanca, too (de Vitoria and the like).