User blog comment:Hermione Chase/"The Blood of Olympus" Expectations/@comment-5984859-20140811134137

If someone gonna die, I can not believe that will percy. except he will brought back from the dead.

Just to remind : both annabeth and percy getting alive out of this, as they appear year later in the crossovers.

Annabeth also mention frank, and looks like he also alive :

Annabeth recalled a quote her friend Frank had once shared with her – something from Sun Tzu’s The Art of War.

Personally, I think that most of the seven - even all - survive.

they have anyone his own troubles and tragedies that must to be to them a happy ending.