In this specific one, I don't think they're out of the lightning thief yet,but Athena somehow knows about the Romans and that the prophecy of 7 requires someone to look for the doors of death in Tartarus. I don't remember how she came up on this information.i do specifically remember her valuing her revenge on the Romans over annabeth, and also, while discussing the doors of death revelation with the other gods, mentioning that her daughter won't be going down there. I NEED to see this pay off eventually.
I believe Poseidon talked to Athena warning her not to send annabeth after the mark ,and when she questions why he cares, he answers with something to the effect of "she is instrumental t

