But for real I think Zuneshia's surprise entrance is an interesting topic to go over, a lot of it might not be too good for Carrot though.
First, I want to say that early on during the spoiler chat I had a sinking feeling in my gut that the giant shadow that was talked about was Zuneshia.
I said something along the lines of:
I had this feeling for two reasons, one is that Zuneshia being this close to Wano might make it insanely easier for Carrot to leave the crew and go back home. Before there was just the choice of sailing one of two far-off directions, but now there's going to be the pressure of Zuneshia right on top of Carrot (if it doesn't die and the minks end up living on Wano). Though this could
maybe work out in Carrot's favor as having her home so close by might give her a hard choice for a nice dramatic moment. But I have a feeling it might play more into
@Sigran101 theory about Carrot ending her naivety on Zuneshia.