I don’t know if anyone will have another shapeshifter fruit, unless maybe I missed something? Right now, I expect Shams will be a haki-forward type of guy.

Actually one of the movies, Film Red, heavily implies that Shanks is in fact a Figarland. The film’s immediate events aren’t canon, but that backstory part of it is widely considered to be because there’s a canon databook (or magazine or whatever) that came out around that time that is confirmed to be canon and adds more details. I think Shamrock being Shanks’ twin is one of those badly kept secrets.