It seems that demand for the new Nikon D850 is huge. So huge, that if you pre-order the camera now, you won’t receive one in the first batch that’s released on September 8th.
Here’s the apology, translated to English by Nikon Rumors:
Apology and Notice of Delivery Delivery “Nikon D850”
August 28, 2017
Thank you very much for your continued patronage of Nikon products.
We have received quite a lot of reservations for the Nikon digital single lens reflex camera “D850” planned to be released on Friday, September 8, 2017. Therefore, We may get time to deliver the product.
We deeply apologize for causing serious inconveniences to the concerned parties, including customers waiting for products awaited.
Some customers who have already made reservations may not be able to deliver on the day of release date. In addition, it will be delivered to customers who will reserve it in the future, so it may take time to deliver the item.
We will make every effort to deliver it as soon as possible so we appreciate your understanding.
If you’re trying to get your hands on this camera and you haven’t placed a pre-order yet, you could have a long wait ahead of you.
“[T]here is no chance you are going to receive the camera with the first batch,” Nikon Rumors writes. “Just like the D800, I expect the D850 to be out of stock for months.”