For there to be Crusader States in the Iberian Peninsula, the Crusader States in the Levant would have to be prove strong and solid against the various Muslim Caliphates in the east. Also, it would be best to have those new crusader kingdoms established perhaps prior to the 1400's, back when the few Hispanic Christian Kingdoms were divided and weak (some of them even allied themselves, on occasion, with one of the Taifa states against other Christians). Although, Portugal was the strongest christian power in the region at the time, so any crusader force that arrives in Spain had perhaps best get on their good side.