aren't we missing something here?
the bad guy says that "this" is the ship he has been looking for, but the SH have this 1000sunny for barely a story arc. they aquired the ship after enies lobbies and been lost in thirlller bark ever since, so I guess that not too many people know about thier new ship, and information about it should be avaliable yet (for people outside the marine, at least).

I think we're going from the wrong angle, maybe he also wanted to get the wood from the "Adam" tree and lost his chance becuase of Franky? maybe becuase of franky's order another war started on adam island and this guy wants to avenge?