User blog comment:AYET/Dressrosa arc - Zoro vs Issho - the abandoned plot/@comment-4899461-20140708124354

I expect that they will cross blades again in the future. Sabo v. Issho will be a battle that will go on far too long, and once DD goes down, Issho will stop. Luffy has had several confrontations with Admirals and it would be unfair if Zoro never got to confront one before he got to their level.