First, we'll need a "Creation" section for all the creations that the rp'ers will... Create. We'll need a sub-section for "Approved" and "Disapproved" creations. Also, they'll have to put a prefix in the title so it avoids confusion of what they're creating.
Example: [One Piece] Name Here
Example #2: [Naruto] Village Here
Second, we'll also need an OOC (Out-Of-Character) section for the outside discussions of the roleplay.
Third, we'll need the Roleplay Stories section for the actual roleplay. And a sub-section called "PvP" for the Pvp's.
I think that's it.