Maintaining consistency of a story between multiple GMs is incredibly difficult, especially when the story has a span as long as the Zuma's. Just look at what happened with Vates: He created so many storylines for the Zuma but did so without collaboration from Haktoo left no usable notes behind for Haktoo to work with. Or you could look at the disaster that was Netherworld in the fourth invasion where some GMs out right refused to work with others.
Yet human realms composed of many players do manage to keep up a long term realm tradition.
(Yes, I know, I just contradicted my previous post by comparing the Zuma to a human realm. Sorry. I guess I'm not particularly logically consistent today.)
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