So, uh, yeah. Cartoon Network posted the biggest spoiler video I've ever seen xD

[There should be a GIF or video here. Update the app now to see it.]

And a lot of people are saying that the end where stevonnie/pink diamond punches the glass, well, I'll just show the picture-

As I was saying, a lot of people think this is a metaphor for pink diamond shattering herself...

But in my opinion, this doesn't make much sense given pink diamond's personality.

If anything, Pink is a spoiled brat who wants everything to go her way.

If this shows anything, it's that her anger and selfishness will likely lead to her death.
That's also probably why the human zoo was made, now that I think about it.
Pink Diamond was likely enamored with humanity, however, like a young child with their first pet, she didn't recognize how much the humans were suffering when she didn't give them what they needed to survive.
Most of that is derived from a certain line in the human zoo episodes where one of the crystal gems (I can't remember which) said that humans were severely maltreated and I think also used for entertainment in the human zoo.

That's just my thoughts though.