User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-4555714-20130924001215

"Round it [Tartarus] runs a fence of bronze, and night spreads in triple line all about it like a neck-circlet, while above grow the roots of the earth and unfruitful sea. There by the counsel of Zeus who drives the clouds the Titan gods are hidden under misty gloom, in a dank place where are the ends of the huge earth. And they may not go out; for Poseidon fixed gates of bronze upon it, and a wall runs all round it on every side" --Hesiod, Theogony

source: http://www.theoi.com/Kosmos/Tartaros.html

Could these bronze gates be the Doors of Death we are talking about? What if a descendant of Poseidon has to close the Doors, because Poseidon put them there?