DiabloFans

Well the Witch Doctor seems to be a mix of the necro from D2 and the warlock from WoW with some of the DoTs along with the idea of the skills (diseases) spreading. With the classic RPG character set in mind we already have the huge heavy hitting and the summoner. So they still need the fragile and heavy caster class (Sorc or another name), more durable and less heavy hitter ranged class (Amazon w/ or w/o melee skills?), and a combo melee/caster (the Paladin everyone seems to like oh so much).
Blizzard has liked to break the trend at times but also stick to the classic recipe which is more along the lines for the Diablo franchise so regardless of what names Blizzard chooses, this will probably be the line up.

It's been mentioned before but Blizzard should stick to their areas of expertise. They know how to make good PC games, no one denies that. They would have to bring in an entire new production staff to switch it over to any console not to mention the control issues everyone has touched on. It just doesn't seem like it would be a good financial move unless they seriously advertise the game on TV like all the other console games.

PvP is a valuable aspect of the game for a lot of players but with the lack of a strong currency in Diablo 2 it was never really a problem. If D3 has a strong currency system (yes similar to WoW if you so desire) then the PvP element will probably get more focus from developers... just my two cents.