User blog comment:12th Supernova/Chapter 815: Germ Warfare/@comment-15667295-20160204222443/@comment-24769684-20160205003202

If Luffy goes to Big Mom and the others stay on Zou, I'd like Jack to return and for Law to defeat him. It might be controversial, yes, but Jack seems more like someone a swordsman would fight.

Or they could head on to Wano without Luffy, which would increase the likelihood of the Zoro-centric arc that a lot of people want to happen.