"One Piece" took a one-chapter hiatus after the events on Zou Island, drawing to a close the Zou arc. Now, Luffy and some of his crew, along with some of the Mink tribe, travel in pursuit of Sanji, who is on his way to meet his bride.
According to speculations, the upcoming chapters will focus on Sanji's previously unseen background, with the latest chapter finally revealing at least one of his brothers.
VineReport says that based on fan predictions and possible hints in the last chapter, Sanji's older brother, reportedly named Niinji, will board the Thousand Sunny to warn Luffy and his friends not to totally cross over to Big Mom's territory.
Luffy wants to crash the supposed wedding of Sanji and Big Mom's daughter, reportedly to convince Sanji to go back with them. In addition, Luffy will also try to get one of the poneglyph stones in Big Mom's possession, since the stones serve as map to Raftel, the supposed location of One Piece.
While chapter 825 did not point out that it is indeed Sanji's brother who will come from the Germa 66 ship, his eyebrows that curls at the end much like Sanji's hint that the new arrival will have some connection with the Vinsmoke family.
Sanji separated himself from Luffy and the rest of the crew to ostensibly clear some confusion with Big Mom's crew. Big Mom, one of the Yonkou, is marrying her daughter to Sanji, who is revealed to be one of the heirs of the assassin family, the Vinsmoke. The marriage will bolster relations between the Big Mom Pirates and the assassin family.
Meanwhile, it is also noted that the Vinsmoke family may have something over Big Mom. In chapter 825 as Sanji is trying to provoke a fight with one of the pirates, another one onboard the ship cautioned the others against hurting Sanji, saying that "They'll ice father in the blink of an eye" should Sanji suffer so much as a scratch on him.
