Aww, that's like me last year waiting for it to be this year just for the Elder Scrolls Online. Which still isn't out yet... *crosses fingers for beta.*
While date/place/time is still up for whenever.. you're right about the looking similar. Best way to do that would be to discuss fabric types and skirt types. So we do an anime style with perhaps a pleated cotton? Or a nice matte stain and have it drape like a manga style others do? That way if anyone wants to get started early, they could, and even though we may not have everyone for awhile.. we could start with the inner group, neptune and uranus, etc, and when more people come and join we'd have an outline of what we used for ours so we're similar.