Like the weapons pic, I spent too much time on this to scrap it.
While I haven't worked out how to introduce/explain it, the Keyblade Armour should foreshadow Sora's Liberated form, as to not make it a Giant Space Form from Nowhere (and hint at whatever connection he or Roxas has with Ventus). Its appearance depends on which Keychain Sora has equipped, and totally does not resemble robotic armour at all. >.> (I based it on Ventus's, but the arms came out all Megamannish anyway)
Also, no Days spoilers; all I know at this point is that Xion is connected to Sora and Roxas.