Ha0 theorized that Rayleigh had to give up the location of Raftel to get Teach to leave, because it's the opposite of what Luffy did (refusing to ask where it was and take the long way to it).
It parallels this
Would be a perfect bb way to get to raftel.
Makes me think shanks vs bb is deffo next as luffy still needs 1 more rp to meet teach in laftale