User blog comment:SayuriDarling/Rick Riordan Reads BoO Sneak Peek!/@comment-3146930-20141005015011/@comment-3146930-20141005134345

But we haven't, there are the Gigantes and I'm sure we will see some of the Roman gods. Neptune/Poseidon is bound to make an appearance at some point, so a picture of his Roman form isn't out of the question. Maybe even some concept art of scenes from the book.