According to Rob Pardo, the new models won't all be released at once, so it may be a while before we know what all of them will look like.
I'm not the only one who thinks that, and complaints have been loud and long on Blizzard's forums.
The worgen, goblin, and pandaren models will not be updated at the time.
, but samples of the new male orc, dwarf, and gnome models are now available on the new expansion pack's site.
Before I go any further, it's important to recognize that Blizzard tried to pre-empt complaints by simply enabling players to chooese whether or not to use the new models.
A sensible option for sure, and I will most certainly be one of the players using it.