Never say never. If I told you during Cata that we would be going to a lost island called Pandaria and it would be Chinese themed with an over lining narrative of Horde vs Alliance you'd be like PFFFT yeah okay! Emerald Dream is the next expansion!
Dire Maul doesn't have to be a all Ogre place, but it will be the main Ogre city though.
There could be the Freewind Tauren, Orcs and Trolls there for safe protection, Blood Elves exploring the place, Goblins building their things, and so on.