Maybe we will see more yet!
Seems like we have pretty much all the leaders appearing in the end http://www.youtube.com/watch?v=1JKY6GBVk10&feature=plcp (Thanks Silencer for the video).
Now we just need to see them do something.
I'm intrigued to see that Nobundo was the Draenei that showed up. I'd love to see him doe something. I think him and Velen would make for some excellent Draenei story.
I'm a little disheartened to not see Mekkatorque, but at least Genn shows up.
I was hoping for more voice acting though in this quest.