User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-4902593-20130222110128/@comment-3146930-20130222113629

Except "some scenes" implies that there won't be a lot, bringing a POV from Tartarus into question. We also don't know if dreams or visions don't work in Tartarus as no one has ever really tried. Also, considering the time that Nico left in The Son of Neptune to find the Doors of Death, and when he was captured in The Mark of Athena, he couldn't have been in Tartarus for more than a few days and Percy's dreams were focused elsewhere at the time.