Seriously, when you browse toy/hobby forums, including this one as well, people do post some scans or announcement from the toy makers itself. And we get idea on when is the PO date. And sometimes, if you browse the online shops, they will post a dummy page or a placeholder and states when the preordering will start. But all in all if you just follow this thread, you'll get to know soon when's the PO date. Click on the 'Follow this topic' button on the top right of this page and make sure that the notification is clicked too so that if ever someone posted a preorder date, you'll receive it directly on your email, then you can watch out for those online shops and prep your finger on pressing F5 on your keyboard during the PO night. Good luck!