Brook said that Big Mom came two days ago, which means that Sanji got the wanted poster of 'Only Alive' before Big Mom arrived at Zou- making the connection between them and Sanji definitely meaningless. We need to be careful before drawing conclusions you guys. I believe that as soon as Pekkoms goes up to Zou and realizes that the strawhats are the saviors to his home phantom island, the strawhats wont be in too much of a pickle as this chapter is a RED HERRING about what happened to Sanji. Keep in mind that even brook said "All this happened rather secretively" which would mean that the Big Mom Pirates didnt do anything too big to bring attention into Zou. What I believed happened is that Pekkoms will have befriended the strawhats somewhat with a truce for the moment, because they are the saviors of his homeland (this isnt all a coincidence, it's fate!!) and Pekkoms ends up showing the strawhats the new bounties, and as soon as Sanji sees his bounty, we'll...you can draw your own conclusions from there. It just seems like we still know little, but yet, I am so hype!! Those black words at the bottom of the page are meant to lead fans away from the bigger picture. All this chapter told me, in my opinion, is that the Curly hat crew are one step closer to finally seeing the wanted posters, which will in turn, cause a reaction into Sanji, and he will then ask a favor via Big Mom Pirates (pekkoms) to take him somewhere (which would explain how he got off of Zou in the first place you guys). Let us read between the lines

Brook's flashback panel near the end of this chapter was trying to show that "It was a grave error on their part that they said out loud that they were headed to Zou, because it eventually is what leads to Sanji's mysterious, VOLUNTARY farewell. The situation is much more complicated then we all think! Oda is a mastermind when it comes to storytelling, be mindful.