I had this Idea of how they would continue on Jainas berserk rage.
I could actually imagine something like this happen.
The fall of the Kirin-Tor
Jaina, hurt after the destruction of theramore isle, hatred of the horde and passivity of the alliance forces her to make something happen on her own accord.
She obviously wants revenge on the horde and after Garrosh escapes she becomes even more infuriated.
Jaina Takes complete control of dalaran and convinces her mages of the Kirin-Tor that the only thing that can be done is exterminating the horde by using the prisoners of Dalaran.
Alliance loses control of Jaina and Jaina loses control over the creatures she unleash from the prison.
plot twist - Jaina was corrupted by darkness during the fall of theramore, just like the Sha would with garrosh but more subtle.
The Kirin-tor Falls and Jaina might die or survive (Dont think people would appreciate if she just straight out died) But i wouldnt like to see (IT was only a setback) again.
And in the end of the patch a new faction rises in the ashes of Kirin-Tor which renews the neutrality that was destroyed by Jainas hatred.