Samsung Galaxy E7 phones are now bound for Androdi 6.0.1 Marshmallow update by March or April 2016 as the Android 5.1.1 Lollipop update has been finally completed with Verizon. More details here.
The Android 6.0.1 Marshmallow update has started rolling out to Samsung Galaxy S6 and S6 Edge handsets in South Korea. Other devices under carriers can also start obtaining the firmware through custom ROM.
Samsung Galaxy Tab S2 devices are reported off to a February update to Android 6.0.1 Marshmallow. According to initial reports, 13 models from both 8-inch and 9.7-inch variants will get the update.