The current content patch 3.2... is still on Test.

Arthas, the main boss on the current expansion is not even part of the 3.2 stuff.

So, we have however long until 3.2.
Then we play with that for a while.
Then we will have a content patch with Arthas.
Assuming there isn't more content between 3.2 and Arthas.

At the absolute earliest, an expansion by the Christmas sales season.
Although I'd think Christmas of next year would be much more likely.





*Edit*
Definitely search for "Interact With Target".
And if Jamba was not around when you played last, it rocks.