Need help with making a prohpecy

The characters are from the future, so the canon characters from the series are either extremely old au dead.

The two OCs are the sons of Poseidon and Athena.

If the prophecy could be linked to a war between a God that isn't one of the main big ones, so one of the gods that most people have forgotten.

However, everything is open as my friend, and I are still putting ideas together, so these prophecies can be a rough draft au as detailed as wewe guys want.