...the Sorcerer?!!!
But my precious Diablo classes were so cool, I can't see why they just wouldn't bring back the Rogue, Warrior and Sorcerer. Obviously, since the Witch Doctor is a spell caster, he's taking over the role of the Sorcerer. I think he's much too cartoony and fluid. I vastly prefer the stiff gait of the Sorcerer. And don't get me started on the Barbarian that is clearly replacing the Warrior. What next, Blizzard is going to release info on some two-bit, ranged weapon weilding, cartoony replacement for my rogue?
Anyways, in all seriousness, I really am digging the whole Witch Doctor thing right now. I think it's a very cool character concept and can't wait to get my hands on it to be able to play around with him. I am slightly disappointing they are rehashing the barbarian, but at least they've included enough tweaks to make his gameplay seem different than Diablo 2's Barb.
It seems like I might be one of the only people that is happy to see new classes. I doubt I would have liked Diablo 2 as much if it had just been Warrior, Rogue, and Sorcerer. Anyway else happy about the change?