Rendered images of the Samsung Galaxy S9 have surfaced, showing the S9 with a single rear camera, the S9+ with a dual rear camera setup, and both with a new fingerprint sensor placement.
https://www.notebookcheck.net/Images-of-the-Samsung-Galaxy-S9-and-S9-revealed-S9-to-feature-just-one-rear-camera.272644.0.html