World Of Warcraft Expansion lvl 90?

I think that if there was a new expansion, it could either go to 90, or skip straight to 100. As for new features, i would really like to see a new faction, while still having horde and alliance. This new faction could include a few new races, possibly the hero classes. If a person created a character in that faction, they could choose to side with alliance or horde. By doing a quest chain to gain favour with horde/alliance, they could then interact with their own faction, as well as horde/alliance.

As for where the new expansion would be set, i have heard many ideas, including:
> The Maelstrom
> The Emerald Dream

When it comes to the next hero class, most people are guessing a healing class. Maybe a class that can make healing that much more epic.