The movie is about a girl who conquers the (much much older) demon-slave of her fantasies(be careful what you wish for, stalkers might give it to you) and retrieves her baby step-brother Toby from his realm. It is about emancipation, morality, letting go of pretense and superficial prejudices,standing up to someone who encourages your faults in order to win your affection and finding the right path as every fantastical hero/heroine must. To pair her with the control-freakish/obsessive/cocky/mean/arrogant/cruel goblin king in the future would chuck the entire point of the parable into as garbage disposal.

A Hollywood production of the return of the goblin king would be blasphemous and unforgivable.