Has Blizzard spedcifically stated that there will be multiple hero classes for each class? If not then I am of the belief that there'sgoing to be only one hero class per existing class, and that talents and new abilities are going to be where you are allowed choice.
If every class were to get a minimum of two options then you'd have 18 classes to deal with in addition to the 9 base classes. As someone joked about earlier there wouldn't be enough tylenol in the world to cure the headache that would create balance wise.
