Ok, rejoice (or scream), cuz I'm back.
That's a lot of questions to be answered, but I'll try to do it (and as I remember the question and not the user who posted it, I'll not post the author, so sorry for it).
Sorry for going back to hinata, it's just this paragraph (promise): About the mangaka never showing anyone alive if they'll kill them moments latter. Someone said he already did it (wrong), look again, if they returned for a brief time, like jiraya, it's shown immediately and not two or three chapters latter. And now that I know her role in the story (besides the naruhina mass desire for her ending up with naruto), I assure with everything I have that she'll be alive.
Now kakashi, remember kakashi doesn't died cuz any wound but cuz he used all his chakra (all the way to zero points). As kakashi himself said, the consequences of using all your chakra is death, but that's what he say and we don't know for sure it's consequences (but assuming what kakashi said is true, then he's dead).
Pain's new technique is very capable of hurting or even reverting six tails transformation if you consider the description. And the technique range appears to be very small and concentrated to even hurt someone in the village.
And sakura's reaction, that was a joke, but I believe we'll never know her real intentions as everything she says on the whole manga (for a strange reaction, she never complete her sentences into something comprehensive for us the readers).
I noticed and already posted yesterday that the hokage mountain was destroyed.
That's it for now.