User blog comment:SayuriDarling/The Mark of Athena Official Discussion/@comment-111.193.219.138-20121008151352/@comment-5593616-20121008162853

I don't think your theory is crazy; It's actually really interesting, but I don't think Percy would let Annabeth stay in Tartarus, even if he is with her. At the end of HoH I think he will force her to go through the doors without him before shutting them, THEN in Book 5 Annabeth will be grief-stricken about losing Percy and will abandon the quest to go try and find him.

P.S I think my theory is crazier than yours : p