What character will you be in Diablo III? Atm only two classes have been presented. The classes are Barnarian and Which Doctor.
http://www.blizzard.com/diablo3/characters/
My guess is that most of the following classes will excist as well (Diablo II classes): Amazon, Sorceress, Necromancer, Paladin, Assassin and Druid.
A guess is that they have splited up the Sorceress class so there into a couple of diffrent classes each specialized on a certain kind of magic. Also a is that they will introduce a 100% warrior class beside the barbarian.