Or perhaps his morphing stick or whatever it may be is a spoiler, not because it is something we've seen already that would tie him to something (keyblade, etc.), but a spoiler because it is something that has a deep involvement with KH3
It could be a spoiler without us even knowing that it is. Perhaps his ability to create or mimic weapons has some importance or relevance to KH3, so us knowing what it would be would be a complete and total spoiler even without us knowing
If you think about it, the direct definition of a 'Chaser' is someone who can craft or engrave metal. And what do we know of Zexion from this and from COM? We've seen him mimic the Keyblade, and now we've seen him mimic the Souleater.
Tie this in with the definition of Chaser, Zexion's ability may very well have some connection with what these 'Chasers' are capable of, seeing as Zexion as far as we know is capable of Crafting/Mimicking weapons (which just so happen to be metal)
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Just because it's a spoiler doesn't mean that it's something that we've seen before, or that it's something that we even know of. If it was anything at all that has a deep involvement with the key plot of KH3 then it is a spoiler
If Zexion's Weapon Crafting/Mimic ability was something that the Chasers were capable of, or if his Weapon which allowed him to do this had some involvement with the Chasers or KH3, then it would be a spoiler regardless of whether we even understood what it was or not xD
