User blog comment:SayuriDarling/Full first chapter of The Mark of Athena/@comment-4606607-20120613003935/@comment-5090305-20120613010211

It might not be the two of them really fighting, it could just be a representation of the two camps and their rivalry/conflict with one another. Or it might be a dream that one of the characters is having; worrying about what could happen between the camps. I guess we'll have to wait for the fall to find out the cover's real meaning. All we have now are speculatons.