@Davis-Lightheart:
Fair enough.
I do want Shiki to at least be mentioned again, because if what you say is true, then he needs to be addressed again, or else what was the point of Chapter 0? It introduces the fact that Roger had found some sort of weapon, but aside from that, Shiki has no purpose even being the main feature of the thing, other than some publicity stunt for a movie that, "isn't canon".
And come on, if a character from another manga entirely could get a reference in One Piece (the zombie from Thriller Bark, can't remember his name) then Shiki has got to at least be referenced again.
You're thinking of Ryuuma. He was in Oda's one shot: Monsters which was published in Wanted. http://www.citymanga.com/wanted_oda_eiichiro_tanpenshu/chapter-4/01/ You should read it, it's utterly fantastic, and you can see the precursor for the scene during Arlong Park when Nami asks for help.
Hell, everything in there is good, read them all if you haven't, including the original "Romance Dawn." That or it's his second version. I can't remember.
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But yeah, Shiki will probably be mentioned again, but I doubt the events of Strong World ever will be. Chapter 0 was just a bit of fan service for the movie, and even it can't be considered canon, as you don't need it to understand the series on the whole, but it is a nice supplement.
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@Davis-Lightheart:
Again, inconsistencies. And it's spelled with only one N.
It's not an incosistency, especially since it happened in the manga before the movie came out. If are adamant about it being an inconsistency, then you're going to end up sounding like Foxy who had a similar argument about Oda messing up and writing "Admirals" instead of "Admiral."
How was Moria able to summon stitched up zombies without Dr. Hogback? If people who have their shadows stolen with the Fruit die in sunlight, why didn't Moriah lose the shadows? If the zombies were frozen in salt water ice, why weren't they immediately cleansed?
It must have been a while since I last read Marineford, as all I remember for Moria is he killed Oars, got pwned by Jimbe, and then nearly got offed by Dolfa.