Google is not good in keeping secrets as just about every possible detail about two Nexus devices has already leaked, passed through the bowl of the mass media where it has been flushed into common knowledge.
Nexus 5 has 5.2 inch screen with 1920x1080 LCD with 424 ppi covered with Gorilla Glass 3. The phone has a fingertip reader, but everyone does these days..
It comes with a Snapdragon 808 clocked at 2.0 GHz with six cores, two A57 and four A53 and it has 2GB LPDDR3 RAM. It measures 147.0x72.6x7.9mm with 136 grams.
This is the first phone to launch with Android 6.0, codenamed Android M or Marshmallow, and it will launch a new Android trend. From now on we will see new phones with micro USB Type-C. The Nexis 5X will sell for $379.99 which sounds reasonable. .
At the same time, Nexus 6P will launch at $499 with 5.7 inch 2560x1440, metal unibody, Snapdragon 810 v 2.1. Google are using sub-revisions of the processor so this one will not overheat. The phone weighs 178 grams and has 3450 mAh battery, USB Type C for faster charging and data transfer as well as dual front speakers.
The large one will come as a 32GB, 64GB or 128GB and since this is a Nexus device you can forget about microSD support. Google will tell us more tonight.