I'm actually glad this came up.
I'm not sure if everyone knows, but Harry is creating a new forum called Pokemon Crossroads, and has a lot of people from all around the fandom helping out. Harry doesn't know about expanding there as far as I know, but I think it'd be a great idea, especially since URPG's leader is the head of the forum, ha ha.
As for when to expand, you guys can do it when the new forum launches, sometime before X and Y, or after X and Y releases. If we do it before XY launches/the forum launch, then you'll have to edit the threads anyway. But if you do it after XY launches, you'll get all the work done then. I think it'd be better to do it sometime before, so you guys aren't loaded with a lot of updating and moving, and to get everything up and situated before the updating starts.