This morning I was surprised to see the LG Nexus 2015 image leaked on Twitter before the launch. This image confirmed the formfactor and physical design of LG Nexus 2015, which we already know from a animated LG Nexus 2015 teaser leaked previously.
UPDATE : Checkout the latest information regarding 

LG H791 aka LG Nexus 5X, buy on Amazon

This year's LG Nexus 2015 is going to have fingerprint sensor and its looks like LG Nexus has a heartbeat sensor or that might be laser autofocus sensor for camera.