If you are the owner of a recent (within the last 2 years) Samsung smartphone who is anxious to try Android 6.0 Marshmallow on your device, then you may want to take a gander at the above image. It is supposedly the leaked roadmap of Samsung's plan to bring Marshmallow to its various current generation devices (and all the way back to the Galaxy S5).
As you can see from the chart, a number of devices are still in the "waiting approval" stage, but at least they are on the upgrade list. It looks like the Galaxy Note 5 and the Galaxy S6 Edge+ are the first to get the Android 6.x rollout and it will likely be next month. After that, the Galaxy S6 and S6 Edge are scheduled to get their update in January of next year, while the Galaxy Note 4 and the Galaxy Note Edge are up for February.
Feel free to peruse the chart to see if your particular Samsung device is on the list.
Source: Exclusive: Samsung Galaxy Android Marshmallow Update Roadmap Leaked - Times News UK, World, Gadgets, Mobiles News