The best thing about Android is how it will update itself, even if you have to wait for it. Such is the case with Samsung devices, as the recent upgrade to version 6.0 (also known as Marshmallow or Android M), which got its upgrade in winter and spring this year. Now, the big fuss is over the next version with Nougat (also known as Android N and Version 7.0), and when it will have its rollout. This is what is known about the Android Version 7.0 Nougat Release Date for Samsung S7, S6, S6 Edge, S6 Edge +, S5, Note 5, Note 4, and Note 3.
According to Vine Report, it was expected that the Galaxy Note 7 would be the first Samsung Android device to be receiving the Nougat goodness, but then the whole Galaxy Note 7 recall happened. Granted, the last report showed that Galaxy Note 7 replacement appears to be in line, in spite of the clear black mark on Samsung's normally good record.
Assuming that Nougat will come to Samsung's newest device, it will then come to the later ones such as the Samsung Galaxy S7, the S7 Edge. That will be the first wave of it with it, and then there will be the second wave on Samsung S6, the S6 Edge, the S6 Edge +, as well as the S5 (possibly later).
As far as the actual release date of Nougat is concerned, it will probably begin coming out in early 2017, according to Expert Reviews. This is based on what happened last year with the Marshmallow release date, which didn't really finish its rolling out until March of 2016. A report from Pocket-Lint puts the Nougat release date also happening sometime in March of 2017, and that is probably a good estimation.
I would expect it to come later rather than sooner, as this is the pattern of Android rollouts. The other pattern is how some carriers receiving the upgrade first before others. This year could be different.
As we have reported before, it seems like the Android upgrade is coming earlier. At least when it comes to Google Nexus, because it is coming to the Nexus 5X and the Nexus 6P even before Google has put out their new devices.
So, if you haven't received Marshmallow on your "newer" Samsung device like the types listed above, you should take care of that. Just check your "Settings" and "System Updates" to see if Marshmallow is ready to download OTA. This upgrade might not be ready depending on your U.S. carrier, as it has been shown that certain carriers receive the Android upgrade before others, with no real pattern. The same goes for Nougat, when it finally comes out for Samsung, which would appear to be early of next year.