Board Thread:General Discussion/@comment-26681785-20150715200805/@comment-26674678-20150719053054

It's a cute theory, but no way it's true. He has human parents and a video of him being born. Even if it was true, it wouldn't make sense. In "The Return" Jasper says: "Yellow Diamond needs to see this." Why would she travel back to Homeworld if Onion was Yellow Diamond and on earth? And i f you watched the extended theme song shown at SDCC there was a scene where a new gem was shown, most likely Yellow Diamond.