Board Thread:Fun and Games/@comment-25559267-20150331163300/@comment-25365147-20150402230220

Jasper did call Pearl "defective", and there's probably some meaning behind that. Someone on TV Tropes pointed out that maybe Rose couldn't figure out how to heal corruption, but could've found some way to keep it at bay. If it is Pearl, she'll almost certainly be reformed by the end of the episode, but I doubt it will be easy. Steven's powers are activated by emotion, and since he loves Pearl, maybe his powers would be amplified with that.

Alternately, the episode could be about a Gem monster we've already seen, getting reformed. I mean, it's already been suggested that we're going to see more of the Homeworld Gems in the future, and they might try to invade. Garnet, Amethyst, Pearl, and Steven won't be enough to fight against Homeworld forces, so I'd be willing to bet that the show will eventually have Gem monsters get reformed and fight alongside the Crystal Gems.