hi
here post some ideas for script events
my ideas:
timurids
about 1360 huge rebel armies spawn around samarkand
crusaders
in 1095 the pope calls the first crusade all "the deus lo vult" stuff and when an european faction conquers jerusalem they get the whole kingdom crusader unit roster
anti popes thats actual not my idea
albigensian crusade
about 1200 toulouse gets rebell and the pope calls a crusade on toulouse
teutonic order
about 1230 the pope gives germany the mission to conquer königsberg and if they do so they will get all the kingdom teutonic unit roster (only for the hre)