User blog comment:Hermione Chase/"The Blood of Olympus" Expectations/@comment-24139594-20131107004841/@comment-3285234-20131108111729

^^ the keyword is KEEP. How could he keep his promise if he dies? So I highly doubt that is the oath the prophecy is talking about. In fact I see it[Leo's oath] in a positive way. Now he has a perfectly good reason to survive whatever is to come.

The one most likely to die is Frank, because of many reasons.

1. The decision that he has to make that Mars have been hinting since SoN.

2. His firewood, he'd been warned about it multiple times.

3. He never talked about his possible future, Percabeth have been thinking about babies! Leo want's to find a way to help Calypso, Jason want's to live as a Greek.