I want this to be the Mother Flame blowing up so badly, but, I don't think the timing is right, yet.
Robot is safe bet, but, I could see this being a Zoro vs V. Nusjuro clash.
IMO, Oda is going to clear the Gorosei off one by one (Saturn and Mars are already down), and then have them all come back at once.
So, the Ancient Robot takes out Warcury and Ju Peter for a bit, and V. Nusjuro is pushed back by Zoro and Jinbe.
Uranus is always a possibility at this point. I still believe Uranus was used on God Valley, would be a nice tie in to see it here.
