User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-50.98.199.110-20130216004714

Since MoA's POV's were all the greek demigods in the prophecy of seven, I think the next 4 POV's will be Jason, Frank, Hazel, and possibly, Nico or Reyna. I know that Nico is not properly Roman, but neither is he Greek as he traveled to both camps. Some people are even saying that he has visited the Egyptians (Kane Chronicles) so I don't think its a big deal if he's not Roman.