True but from what I know James was pretty set on having either a Spanish or French princess (the former I doubt would work because Henry despised the Spanish). James was in negotiations for a French match before Henry's death to my knowledge.Henrietta Maria's a decade younger than him, I'm not sure he or James is going to wait that long for her to be of an age to get married.
If it ends up being a protestant match maybe the daughter of William the Silent Countess Emilia Antwerpiana?