So we have new names added - Carrot (high demand at this point), Blackback (gorilla) and Weeble (Has his appearance before, but yet to be seen in Zou. Put him in KIV List for the time being).
In this arc, we are going to face more Minks and of course anyone can be a potential candidate. But I doubt we would get a new nakama in this tribe. As we already have Chopper, perhaps it may end up too many animals in the StrawHat crew? Of course I wouldn't mind another one to join.
Let's see how it goes as the arc progresses.