User blog comment:SonOfZeus1200/The Camp Half-Blood & Kane Chronicles Series will collide!/@comment-64.134.161.179-20120528223153

A crossover will happen, but most likely not in the next Egyptian trilogy. From the comment about the Sea of Chaos at the end of TSS, it seems like before a Greek/Egyptian crossover, they will have to fight Nun (the deity embodying the Sea of Chaos that was prophesied in Egyptian mythology to destroy the world). The Heroes of Olympus is already complex enough (and will get even more complex no doubt as it progresses) without having to throw in Egyptian mythology into the conflict. Plus the rival magic/other gods comment could refer to an entirely different mythology that will be introduced in the second Kane series much like Roman mythology in Heroes.