User blog comment:Jborg007/Sanji Retrieval Team - The allies they could gain/@comment-24684875-20161112080128/@comment-26058050-20161114032616

I believe Whitebeard pirates/allies are to appear later on since there is currently a splinter group from the current alliance, with Inuarashi and Nekomamushi, heading to locate the remaining Whitebeard pirates. It's most likely that if they join alliances, then they will be involved with eitehr against Kaido, or more likely, Blackbeard.

Bonney is up there as one of my expected worst generation appearances, along with Urogue. I heard a theory on her being the daughter of whitebeard (given her reaction to his death) and linked it with Big Mom having so many husbands and children that it could be possible that she is their child. Doubt it but you never know.