A new screenshot released by Android Soul says that the Samsung Galaxy S7 will start getting Android Nougat update starting next week, from January 17, 2017 to be precise. Thereafter, the update will then roll out to the Galaxy S7 Edge. The screenshot reveals the model number SM-G935F which is of the European variant indicating the roll out to be restricted to Europe as of now. 
This is in line with the previous reports of the company claiming that the S7 and S7 EDGE will skip Android 7.0 update and straight away get Android 7.1.1 Nougat. However, as per a reply received from one of the executives of the Galaxy Beta Prgramme to an XDA member, the company is still testing Android 7.0 update on the Galaxy S7. So the confusion about the Android Nougat version still persists. Earlier, in November, Samsung rolled out Android 7.0 Nougat beta program for the Galaxy S7 and S7 Edge.
As far as the official source code is concerned, Android 7.1.1 developer preview was first released in November 2016, the stable version of which is now available on most of the latest Google devices such as Pixel, Pixel XL, Nexus 6P, Nexus 5X, Pixel-C tablet etc.
If you are not aware, Android Nougat brings in a bunch of new features including split-screen multitasking, more customisable quick settings, better battery life, improved Google keyboard, enhanced notifications and recent applications window. Further, the latest Android OS version also brings in ‘Double Tap’ on the Recent button to switch between the two most recent apps which come in very handy at times. For extended battery life, Android Nougat comes with ‘Doze on the go’ which will get activated even if your Nougat running device is in your pocket. However, the App shortcuts feature from Android 7.1.1 will most likely not be included in the Galaxy S7 update as the feature is only available for select Google devices. On top of this, the new camera app on the Galaxy S7 will get automatic Exposure, Viewfinder grid models, Smart Burst and AE/FE locking.