Although there was not an iota of doubt regarding existence of the soon to be launched Samsung Galaxy S7 edge (or its name), an official confirmation from Samsung's own website is surely an important thing before the launch.
They recently added a new page about the edge screen features on the website where the company lets developers download SDKs and other similar development kits. This page is not only dedicated to description the edge screen features, but also used to show the devices in which they will be used. The most likely candidates, the Galaxy S6 edge and Galaxy S6 edge+ are listed just like the Galaxy S7. Hence the existence of the flagship device along with the name is officially confirmed.
Apart from this, new edge display functions, which are matching with the S6 edge models's display features after getting the Android 6.0 Marshmallow upgrade, have also been displayed on the website. Adjacent to the normal, narrow edge panels (‘Edge Single'), wider type (‘Edge Single Plus') panels will be added which will show more information and functionality. Those who loved the extensive functionality of the edge display panels present in Galaxy Note Edge, would sure love these wider edge panels in this smartphone.
It is nice to know that Samsung is proactive when it comes to finding fresh and and improved ways use the most popular features that came with nice aesthetics, but didn't score much in terms of functionality. It looks like the Galaxy S7 edge is moving in the right direction.