Board Thread:Off-topic/@comment-28259364-20151231132701/@comment-34633311-20160102164557

I'd say that in one episode, Peridot finally receives a response form YD, however the message sates that she's "just a Peridot" and that YD will leave Peridot on Earth, stating that poor little Peri is stuck on (insert Homeworld's name for Earth here) and they'll all be shattered once the CLuster emerges. Somewhere around there Peridot gets mad and tries to smash the CGs because it was all their fault and she would shatter. Steven calms Peridot down in some way and the CGs find some of Peridot's logs, which reveal information about YD and Homeworld (and other stuff too).

My theory. Nice.