User blog comment:DivaytFyr/Yet just another speculation/@comment-4822693-20130516211939

Not only is Zangetsu's name symbolic, but so is getsuga tensho "Piercer of Heaven". On top of that FGT is called mugetsu "moonless sky". I think that not only will Ichigo end up defeating Juhabach, but that he will relearn mugetsu and use it to literally destroy the moon of hueco mundo. It's the only technique we have seen that could be that powerful, and it would make the name highly ironic.