This has not been fully confirmed, but if it is, wow.
First info about Zoro's ministory has been released, and it was I have predicted for quite awhile: Ghost-cutting
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Additional info: It is revealed that a special "prison" ability will be used to capture all of the pirates. This was Sengoku's true plan.
Also, Luffy, while fighting Smoker, flashbacks to Rayleigh stopping Kizaru. So, if the spoiler is true, expect a haki-powered Luffy in the next chapter or 2.
Also, Marco is not with Luffy because he went off to fight Kizaru (again).
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The Zoro cutting ghosts part is what makes me think this might be fake. All of the other islands ahve been very hush-hush and ambiguous on how the various crewmembers would level up, so Oda outright telling us that Zoro is attacking a ghost seems a bit too well-defined.