User blog comment:Raptor of Love/The will of D. ???/@comment-3563898-20110920192145

I think there will be more additions to the actual crew, not just allies like Vivi. Probably someone we don't know yet will join, but that's a whole different discussion. On that note, your Will of D. theory makes a lot of sense, although in my mind it is probably a mixture between actual treasure and the secrets of D.