User blog comment:Hermione Chase/"The Blood of Olympus" Expectations/@comment-25380572-20140904042802/@comment-25380572-20140904225645

Another update:

Apparently Frank lives because he'a mentioned to teach Annabeth Chinese in Staff of Serapis, which is in the future.

It's all tied down to Reyna, Hazel, Leo, and Piper as far as heroes being marked for death.