they are keeping as much info as possible about the hero classes secret, truth be told i think they dont have much of it finalised, i mean they have about 3 to 6 months to work on it more and im very sure the hero classes will not be in the game at release.
as far as classes i hope to see..
and i think the hero classes are based on race and class, not just your class.
troll beserker, dual axes and abillity to use the troll beserking ability much more often, like 50% or under health or even 70%
Lich undead mage hero class that is just a uber mage and mabey some pet skills for raiseing zombies and skellys
blade master the traditional warcraft 3 orc hero, really strong tank comeing from the orcish warrior class
voodoo witch doctor troll shaman hero class, with alot of fear and mind effecting spells, plus alot more powerfull totems and wards ^^
dwarven treasure hunter a rogue class for dwarves that has a far bigger range for the "tresure finding" racial skill, and improved lockpicking skills
night elf demon hunter they should have a class based "head gear" that is a blindfold to cover up the fact the demon hunters gouge out their own eyes, the blindfold gets stronger over time or levels. plus a whole bunch of bonus abilities for killing demons. the base class would be night elf hunter of course
anyone else got any suggestions?