For starters, it is obvious that BB will appear in Wano. With so many strong people gathered and so many Devil Fruits, da greedy person like him would not let such an opportunity pass. The vast majority believe that BB will appear in Wano and take Kaido's fruit, is this possible? Of course, but BB is always unpredictable. Oda is keen to make his actions unpredictable, some points that may indicate this:
- The BB flag has 8 bones, in addition to the BB his crew currently has 8 members (Yamata no Orochi has 8 heads).
- We don't know much about the fruit, it can be further explored in the hands of BB. Orochi may have an extremely strong fruit but is unaware of its potential. (If there are 3 people in BB's body, he could manifest the other people in Yamata's heads, in some way).
- That witch who gave the fruit to Orochi knew about Shiki's face. (She may have been a member of the Rocks, BB is related to the Rocks).
- I believe that Orochi again did not die, he transformed himself with 6 heads instead of 8, since there were 6 Red Scarbbads in front of him. And he will still have a more important role until the end of the arc. (Deaths in One Piece lmao)...