Noted product leaker, Evan Blass, has posted an image of the Galaxy Note 8 on twitter. It shows front, back, and side profile in two colors. The fingerprint scanner is in the same troublesome location as the Galaxy S8, and there appears to be a dedicated Bixby button.
https://www.notebookcheck.net/Newly-leaked-image-shows-what-to-expect-from-the-Galaxy-Note-8.239810.0.html