Board Thread:Spoilers!/@comment-26443838-20151009221621/@comment-24674051-20151014205949

Ok, they did say the second arc would be hell. and I will concede that could mean a trip to the underworld/nether realms/whatever. They have set up the underworld with the Charon and Furies from "The Price". There is the seance from "Bleeding Through" that definitely hints of an afterlife. Add in the stuff we found out about the wraith and sucking souls (dealing with Prince Philip) from Season 2, and even the stuff from the effects and aftereffects of the sleeping curse, and they have the setup available to go that route if they choose.

However, They could simple mean that, as someone else mentioned, that we will see all of the negative effects from trying to save Emma (including the real possibility that they do no succeed by the end of 5A). As the old expression goes, Hell knows no fury greater than that of a woman scorned. I'm thinking it will be more of THIS type of hell.