Tom Chilton, Game Director and Lead Game Designer
On featuring the changes following Garrosh's defeat in the actual game world, as well as an 'event' that will occur.
"We don't have plans right now to express that in the world in 5.4 -- there's an event that's going to be taking place between 5.4 and the next expansion, assuming there is one of course. (laughs)
There will be an event between now and then.(laughs) So players will have to wait and see how that shakes out.
I don't know that it will be numbered that [5.5] specifically, but yes, there will be something between now, and an expansion, should an expansion happen."