SamMobile site published the following article
about the Samsung mobiles' that will get the marshmallow update
"It’s that time of the year when Google
releases the newest version of Android and everyone starts getting impatient
about when the new version will come to their device, or if their device will
even be eligible for the upgrade. Samsung has never been a company to formally
announce a list of smartphones that will get a particular version of Android,
so we often have to turn to insider information to get an idea of its plans.
6.0 Marshmallow we did exactly that, and we have been able to come up with a
list of devices for which Samsung has started testing Marshmallow. As expected,
at this point the list includes all of the flagships from the last year and so, including
the Galaxy S5, Galaxy Note 4 and the Galaxy Note 5. There’s also the
Galaxy S5 Neo, which is more of a feature-packed mid-range Smartphone than a
should point out that this list is preliminary, and just because your device isn’t
mentioned doesn’t mean it will not get Android 6.0."