>>535288920
Back then people realize Kuroboshi like to put references of his Foreigners in his design, Saber Oui was the first time he did this, so people was using her design to predict future Foreigner
The last unsolved puzzle piece was the broadsword, which turn out to be Molay reference, years before she was released. There still the checkered coattail that is theorized to be Euclid