@Fire Fist:
Vivi: 80% Chance. Though peace now reigns in Alabasta, Vivi had a dream of seeing all the people of the world getting along. Her cultural and political knowledge of the Grand Line would be invaluable to the Mugiwara as they get closer to Marijoi. I'm sure she'll rejoin the Strawhats sometime soon.
**Perhaps that was some sort of foreshadowing by Oda? May he's saying that the Kingdom will in fact comeback and she will have a role in it. Or maybe I'm thinking too hard.
I do, however believe they will meet Vivi again. I think she will have something to do with the lost history. Most likley something with Pluton. Since the Strawhats are getting closer to Marejoa they'll meet vivi there? Perhaps there will be another "council of Kings" and they meet vivi there. Just my hopes.**