| If I were you (Faille) or the person in charge I'd try to keep the first iteration of development just making the central hub with all the technology and players in a game, and once you have that I'd start worrying about making sub-universes.
As I'm sure you're aware, the problem most of these ideas face is people lose interest once they realize the incredible difficulty and time investment because they made their goals too high initially. Having a small scope for the first release of the game would mitigate that somewhat.
Also, having the platform built already will tell experienced developers that you're not making vaporware, and will attract a much better group of people to develop it.
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