User blog comment:Fusedtwilight/The New Death/@comment-9249716-20160218235355

Well, in what you mentioned about the Endless in Dc/Vertigo comics, it's not quite the same with God and the darkness. Since God created everything, it stands to reason that Death and the other horsemen came about after human (all the spiritual beings can't really be ferried to another place since they were spirits to begin with). Also, Death being replaced I would think be more like he returns but he's not the same as he was before, but the writers ahven't bothered addressing it since the season began. Also, Death said he can't destroy human souls so I highly doubt he can really reap God as he says, he probably just said that to rattle Dean.