User blog comment:Tommy,Klaus&Kol2012+/Can this "red hunk of clay" kill the Leviathans?/@comment-174.56.223.166-20120507192206

so the way to kill Leviathans is the bone of the righteous man dipped in the three bloods of the fallen(angels,demons,monsters). Who else thinks that John Winchester's rumored return might be to donate his bone as the bone of the righteous man. IMO it's got to be John, Dean, or the prophet Kevin who donates the bone. Thoughts?