Some users from xda, one of the most popular forums about smartphones gained some information about two Pixel phones with codenames Walleye and Taimen. We don't know if these rumors will be true, but definitely they sound interestingly.

Google Pixel 2 Walleye will be the smaller option, with 4,97-inch FullHD display, and it will be equipped with stereo speakers, Qualcomm Snapdragon 835 processor, 4GB of RAM and 64GB of internal storage. Bigger option gained nickname Taimen and it will have 5,99-inch OLED display with 1440p resolution, Qualcomm Snapdragon 835 processor, 4GB of RAM and 128GB of internal storage. When it comes to 3,5mm headphone jack, only bigger Taimen will have this option.

source