The successors of the Pixel and Pixel XL smartphones are known as Walleye and Muskie for now, and there are also references to a Snapdragon 835 processor, but the launch date and other details are not public at this stage.
http://www.notebookcheck.net/Google-Pixel-2-handsets-might-use-the-Snapdragon-835-SoC.214568.0.html