Deep9, Hell, and Scott's Religious Views

"Deep9" may be referring to the 9th Circle of Hell, Treachery. This is the circle where people who betrayed others are sent to. It is the last circle, and thus, the deepest.Scott is Christian and the Circles of Hell is something which a lot Christians believe in.Maybe the brother of the crying child has been sent here in his dreams and his punishment (for betraying his brother's trust by scaring him with the mask, and then eventually causing his death) is to live out what his little brother had experienced in his final days (i.e. the nightmares).Or, the Purple Guy (or Pink Guy, this would explain Purple Guy not killing his own son) has already killed him by this time and we are experiencing what the cruel brother is seeing in Hell.The Brother is "chained up" in the bedroom where the crying child lived and this explains why he can't leave."Round 1 is named Caïna, after Cain, who killed his own brother. Traitors to kindred are here immersed in the ice up to their chins"