Don't be deceived Von the Titel of this article. I don't actually know who the Seventh Half-Blood is. But i do have some theories. Well actually, One theory.
Nico Di Angelo
1. Why him? He hasn't been seen much in the series. Even in Percy Jackson he wasn't really in the limelight for very long. Well that's one good reason why it could be him. This could be Nico's 'Time to Shine' (that sounded much lamer than i meant it to). Rick Riordan had probably been saving Nico, reserving his character for this big part (assuming he is the seventh half-blood).
2. It would make sense to have one child each of...
Sorry if you've already known this. I gepostet this Artikel a long time Vor on the PJO club, but Hecate thinks it should be gepostet again here, and I agree with her, since it's a very good interview and it gives us some useful clues about what will happen in the Weiter series.
You can see the original Artikel link. Visit link for further information.
Q: The presence of the entire minor god’s offspring is going to greatly change the dynamics of Camp Half Blood and not just Von all the new cabins. Will a rivalry arise between children of the major gods and the children of the minor gods? RR: A lot...