User blog comment:SayuriDarling/The Mark of Athena Official Discussion/@comment-86.28.255.73-20121016215252

I don't think percy and annabeth will be in the HoH- I think jason, hazel, frank, piper, leo and nico will return to camp half blood to stop the war between them first because that's much more imminent and that'll give percy and annabeth time to find the door in tartarus (we might not see them do it like we didnt see the greek demigods' voyage to camp jupiter). Then in the last book they'll all get reunited in greece and THAT is where the party starts....