User blog comment:Fullpower95/Hera saw the battle coming/@comment-3146930-20111203034256

All the gods seem to have some level of foresight so it is possible she saw some events or had a feeling that certain demigod children would be important. Sort of like how Leo drew a picture of the Argo II before he even knew what it was exactly. Some events are clear while others are unknowable to all except the fates.