User blog comment:Percy Jackson12/The Seven/@comment-121.54.46.23-20111016112932

Okay, now it hit me. I know that Annabeth won't be the last demigod. It will be another son of Minerva/Athena. Then, Annabeth will cause great problems maybe because *she* wants to be the one who's the last camper, and maybe she thinks that  she can do a better job than the  7th demigod, hence causing a problem,.

The Child of Athena/Minerva might get angry at Annabeth that he or she will walk out, hence crippling the quest. Or Annabeth could join Gaea's side and Percy might get discourage and choose not to do the quest.