After Madara dies , what do you think will happen to the 10 tails? I mean who would be the jinchuuriki , because for it to be Naruto wouldn't they have to release the 9 tails first - which would be the death of naruto?

I'm also sure Minato and Sarutobi wouldn't use the demon seal again, since Orochimaru has found a way to undo it - which would require Sasuke or Obito(if he lives) I believe.