http://wowpedia.org/Greatmother_Geyah (reference to whom I speak)
She was the mother figure to Garrosh when he was young in Out land and the main source of his depression due to her being very ill and close to death. Whether she is currently alive in our time line is unknown it was retconned that she died shortly after meeting Thrall in The Shattering novel, where she introduces Thrall to Aggra.
Now we will go back in time.....ish.... and I wonder how Garrosh will react to meeting her again. She was his mother figure after all. I am not as interested in Thrall's reaction, but this is because she only played a smaller role in Thrall's life. (Also the retcon did not really fit in Garrosh since she originally dies after meeting Thrall. The retcon has her alive for at least 2 more years)