If he doesn't, it undermines the importance of COC.
The significance of COC is really questionable Sakazuki or Mihawk lack it but Chinjao and Katakuri have it.
The former two are far more kingly than the latter two could ever hope to be.
Sakazuki is the current Fleet Admiral, and he embodies...
@style what do you think Mihawk will do next?
Mihawk helping Perona and Moria would be really cool I think. It looks like Moriah may end up joining BB's crew though. If that happens, I'm not sure what help would look like?
If Moriah rejects BB's offer, then perhaps he could hold off the BB...