Leaks are suggesting that HTC will be launching two Nexus devices in 2016, codenamed M1 and S1. This information comes after previous news of HTC signing a multi-year contract with Alphabet inc.
https://twitter.com/evleaks/status/725395035022319616
The devices are also known as ‘Marlin’ and ‘Sailfish’ according to Android Police. A Geekbench score of a device named “marlin” have been leaked with 4GB RAM and still named Nexus 6p, however, running Android N.
Google is rumoured to include universal support for pressure-sensitive display technology, and hence, the HTC Nexus devices will use 3D Touch type technology and will come with 5.2 and 5.5 inch displays. Running the final version of Android N out of the box. The handsets are expected to be made completely out of metal and have impressive camera capabilities.

