User blog comment:BlueLantern1995/The Prophecies: What We Know and What is Logical/@comment-5649393-20121022105924

Hmm, some good points made. I noticed a couple of errors (an Aphrodite statue?) but nothing that I couldn't tell what you meant.

Now, the second line, To storm or fire, the world must fall: the obvious explanation of this line is that either Jason or Leo will cause the "world" to fall. We may take this literally and believe that something that one of these two do will be catastrophic. Or, as it often is with these prophecies, the line may mean something else. Perhaps the "world" in this line instead refers to Gaea, being the Earth Mother.

Regardless, I think that Frank will also be involved in this line, as anything that has to do with Leo from this point on will intrinsically also involve Frank (the conflict over Hazel, and Leo's heritage suggests this).

An oath to keep with a final breath. Frank is the obvious choice for this. The playing up of the idea of Duty for him in SoN, and the fact that his life will be so short but shine so bright seems to provide proof for this. However we do not as yet know what the oath in question may be, so speculation is almost pointless. It might not have even been made yet.

I agree that Reyna will play an important role somehow. Whatever Aphrodite told her must be important, otherwise why mention it?

I highly doubt, however, that Annabeth will die. The sacrifice that Mars referred to may not be a death. Remember, there are many things that could be considered a sacrifice.

A likely situation to me seems to be one in which Percy has to leave Annabeth in Tartarus (the sacrifice) in order to aid in the completion of the quest. Perhaps Frank and his Duty will have him change places with Percy in this regard, promising him that he will not let Annabeth die (the oath) and thus his death (final breath or the fact that his life will be short).

But all theories are just as valid as any other, and this is all speculation at this point. Anyway, I've rambled on enough for the morning. Those are a few of my thoughts, and I generally agree with your assessment.