User blog comment:Awesomeness34/Thoughts on Son Of Neptune and The Lost Hero/@comment-4528975-20111212002614/@comment-3337043-20111212030321

But that isn't the only reason. There is of course the Olympian Week thing, the fact that she will be with Percy on the boat (Though this doesn't mean much), that Juno said she would cause trouble, and that we are almost certain she will be an important character. It points towards a son/daughter of Athena more than anything else, and it seems to make more sense if it was Annabeth than a new character...