Okay, so the gods have been confirmed; they are Aphrodite/Venus, Ares/ Mars, Athena/ Minerva, Hades/Pluto, Hephaestus/ Vulcan, Poseidon/Neptune, Zeus/ Jupiter.
Right now the half-bloods are
Neptune/ Poseidon: Percy
Hades: Frank/ Hazel/ Nico
Athena/ Minerva: Frank/ Hazel/ Annabeth
I'm not so sure about Annabeth and Nico since one more will be needed for them to be seven; I mean Jason, Piper, Leo, Percy, Hazel, Frank and one more. It could be Annabeth or Nico; If one of Percy's companions is a child of Minerva (they're roman) then Annabeth won't be there, but if one of them is a child of Pluto, then Nico won't be there.
What do you think? I wrote this blog because many people are arguing whether Annabeth and Nico are in SoN book.