User blog comment:SayuriDarling/The Mark of Athena Official Discussion/@comment-4902593-20121112061054/@comment-5577244-20121114173032

Remember Zeus/Jupiter has decreed that the gods are not to venture to the mortal world or contact their children at all (except claiming of course) all the gods that appeared in HoO so far have done it illegally and against the laws of Zeus. So Posidon may just be chiilin at the bottom of the ocean or biding time and staying on Zeuses good side.