Board Thread:General Discussion/@comment-4224349-20150205230904/@comment-26079887-20150206034226

Gnx486 wrote: So Pearl said that there were gems who rebelled "like" her, Garnet, and Rose, meaning there must have been others too. I wonder what happened to them. Someone suggested a while back that the monster gems might have been Rose's allies. Starting to think that might be true. Yeah that is very plausible. But I think the corrupted gems could be a combination of Rose's allies and the Earth manufactured Gems.

At first, I thought that the 'bad' gems constructed a superweapon to anhiliate life on Earth, which causes Rose's and her allies to rebel. Then in the last attempt when the 'bad' loyalist gems were going to lose, they repurpose the superweapon and initiate it to corrupt all gems on Earth.

This episode kind of confirms it, in the idea that the 'bad' gems, more like Homeworld Gems now, were going to somehow endanger life on Earth.