Although nothing more than an unofficial render that looks more like a sketch, the image that surfaced on Twitter claiming to show what the next-gen Galaxy S flagship looks like reveals two key features: a quad-camera assembly on the back and a selfie shooter placed under the display — apparently thanks to a cutout.
https://www.notebookcheck.net/Samsung-Galaxy-S11-concept-surfaces-online-quad-main-camera-in-tow.426914.0.html