Except he’s dead, I’m sure he’d be joining the alliance to fight Kaidou. I mean we now know for certain that he used to be one of Oden’s scabbards, so if him being a Wano native wasn’t enough to involve him in the arc, then him being one of Oden’s scabbard surely is. Plus we know the WB Pirates have disbanded, so no reason he can’t be involved with the current plot on Wano unless he’s dead of course ^^’. Also his connection with Kikunojo is quite interesting especially if you consider that Kikunojo might be Traitor, so I’m very excited to see him again in this arc ^^.
Also Toki’s Prediction mentioned 9 shadows not the 9 scabbards so chances are it’d be the SHs. Toki said 9 shadows shall bring the dawn back to Wano or something, which is coincidentally very similar to what Pedro said about the SHs bringing the dawn to the world.