Whoever's seen the recent manga probly saw the pictures of Kakashi in the upper section of this page.
We can tell he's alive from this!!
1. Why would Kishi show us pics of Kakashi's dead body in this manga, if not to show us that he wasn't destroyed by the explosion, and that there's still hope for him?
2. Why would the slug protect Kakashi's body from the explosion if he was dead?
Yay, he's alive!