User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-10750309-20130921204516/@comment-15860919-20130921220745

On RR's official website, he posted the first chapter of The House Of Hades, at the end of the chapter Arion appears and Hazel says he is trying to tell them something, so i think Arion will somehow help them deal with the ourae