hm... why do everyone think that kakashi is between life and death ???
this is naruto world everyone !!
- it make much more sense that kakashi is under some genjutsu, and if we look back when itachi was in konoha... everyone thought that se was there for naruto but we now know his true reason
, we also know that itachi somehow protected naruto from sasuke (or somethink like that), what if itachi did same to kakashi to prepare him for time when he come so close to death?
anyway that is what i belive is going on here...