It seems that Samsung have published their plans to roll out Android 6. The Note 5 and 6 Edge PLUS will get their OTA in December. The s6 and s6 Edge will get it in January. Let us then see when the carriers push it out.
We will keep watch on Sammobile because it is sure that many will not wait for the carriers but download the software soon as it becomes available.
To do this you need to Flash via Odin.