I think Oda planned another "big" flashback: we got an empress, a former one, strong people and a background story (no man in the island for centuries). I'm quite sure we're going to get some background info on the Boa, but I guess we're going to witness something bigger, maybe related to the past world government, even I can't guess what: as of now, I'm thinking about something big , like a war, in which mostly men were involved; as a result of that, the surviving women decided to get on an island to avoid this madness happening again, and to just meet men for procreation. But I'm sure you guys would have better ideas on that, and I bet Oda will come up with something surprising as always.
Anyone wants to share ideas? :ninja: