In this battle with the hosts I think killer B is going to be killed, because Kishi will want to make the collection of the Bijuu's and the climax as nerve racking as possible, if Killer B doesn't die then Tobi' really didn't come close to completing the Jubii. It could happen that, like Kushina, Killer B has his beast extracted and doesn't die but I doubt it, because the long lives were characteristic to the Uzumaki clan. What are your thoughts on this prediction?