Leaks about the Nexus replacements are coming from multiple sources. The phones - branded Google Pixel - passed through Geekbench, they were certified and also some cases for them cropped up, even the screen panels.
The benchmark doesn't reveal much we didn't already know - the phones will be powered by Snapdragon 820 chipsets (though a new 2nd revision) with 4GB of RAM, but interestingly the OS is listed as Android 7.1. So the Pixels will bring a new minor version of Nougat with them.
The Pixels, despite the Google branding, will be made by HTC. This is confirmed by the Global Certification Forum (GCF). That certification also reveals that both the Pixel and Pixel XL will come in at least two versions - US and International. The US models include CDMA connectivity and slightly different LTE bands.
The cases for both the 5.2" Pixel and 5.5" Pixel XL have a very wide hole for the camera, but none of the leaks so far have mentioned a dual camera.