Theres chakra left in the body and possibly from an outsource. Remember how Sasori made Human puppets it was explained then but to what degree of chakra is not specified. Im for the its bs but dont complain cuz this lets every1 be as badass as can be without restrictions!....
anyways i loved this chapter especially the 1st page and Sasuke/ Itachi combo is awesome. This may be the key turning point for Sasuke's hatred. Cant wait to say Ha Naruto failed at his life goal when Sasuke comes strolling back to Leaf like nothing happened by himself
Now I have one question, should his bunshin use susanoo or not?
Well, from what I understood in the iffy translation, Madara asked them if they would prefer to fight the bunshinor Susanoo. In other words, Hashirama's jutsu or his.
As for the chakra question, a body contains village secrets, which is why hunter ninja (like Haku pretended to be) are deployed to restore the corpses even if the person is dead. The Edo Tensei is not normal anyway. It took a lot of time, research, illegal experiments, effort, & preparation for Kabuto to perfect it beyond the Second Hokage or Orochimaru could.
Too bad, though, Kabuto is lame. I wished for Itachi to meet/fight Madara. That would have been really awesome.
I like how Sasuke only loses his composure when he is around his brother, but I still think he will keep his grudge for Konoha & fight Naruto. It is, after all, destiny.