I don't think they'd turn up at all tbh.
Why would they? Their info on Wano is vague at best (excluding Drake's recon, which is definitely top secret).
If they DID have general info, it'd be even more of a reason not to come given how hard it is to get there.
And even if they did make it there, they'd have to send 2 admirals minimum (1 per yonkou) and then probably all their vice admirals for the commander (which is extreeeeemely generous towards the marines), just for an even fight in enemy territory.
And even if they were to succeed, they'd be so vulnerable everywhere else in the world. Not worth it, and I don't see it, at least in Wano.