Briefly explained the meaning of hero class.
Hero class will start at a higher level and will likely have a unique connection, like with Arthas and the Death Knight hero class.
So my question is..
Which class (that already exists) do you feel could have been a hero class?
Paladin? Shaman? Hunter? Druid? Warlock? or one of the others.
And why do you think so?
Speaking for myself, I feel that the Warlock class could have been a great hero class.
Blizzard could have used the Warlock as a hero class within a Burning Legion expansion.
You have Kil'jadeden as their leader and he is also a Warlock. I think that would have been awesome.