User blog comment:Ranger94/The next Arc/@comment-1454981-20150918172607/@comment-142.51.165.143-20150918174441

Wano will almost certainly give Zoro some new sword skills, at the very least. But I would be willing to expect more.

Wano may not be affiliated with the WG, but it's also not as isolated as Skypiea. When the SH crew gets there, they won't just drop off the map, the WG will know exactly where they are, but to avoid an international incident, they'd have to send undercover operatives instead of a fleet or an admiral. That could be a good excuse to bring back CP-0 or to introduce a new incarnation of CP-9 if it even still exists.

Alternatively, being ostensibly off-limits to the WG may make it a perfect place for a showdown with a Yonko or (more likely) one of their subordinates.