Grayscale as a weapon?

I am pretty sure that Jorah will survive the treatment that Sam is doing on him. I have a feeling Jorah will return to Dany when he is cured and with the only ones with a cure for grayscale they would have a weapon too for their enemies. We will surely see Sam dig out more important information that he can send to John. It will be interesting to follow. What do you guys think? What more can Jorah bring to the show, will he die or will he return to his beloved Khaleesi?