From all the ideas, wishes and speculations, we can dig something for sure, we still only have 2 mail wearing classes in the game, where plate, leather and cloth are highly represented.
It is a rather obvious thing that mail will either disappear or move on, it is a rare armor at this point as either leather or plate seem to make more sense.
So my bet is that it will be a mail wearing class.
Also,
DK = melee,
Monk = melee and healer,
DH = melee,
chances are that Blizzard will complement the game on that area and give us a ranger/caster who uses mail.
What are your thoughts?