What is there to explain? It's a teaser. And besides, at least some CG can be expected. But there's been images of backgrounds released here and there in merchandising stills, and it looks very 2D-centric to me. It'd have to be with animation like this:

According to the art director, the models didn't render properly in the teaser, which is why they look off. Judging solely from the animation, it's one of the most 2D looking things made for theaters I've seen in a long time.

You can count me in the crowd that believes "Rose shattered Pink Diamond" and "Rose is Pink Diamond" are NOT mutually exclusive. Since the season premiere revealed Steven can inhabit others' bodies, it's natural to assume Rose could do it too, and PD by extension if you believe she and Rose are the same. So when we…

I suspected with no real lead before, but now I'm sure of it: Lapis was poofed by the Gem who is currently bubbled in Lion's mane. I'm positive it was Bismuth.

They say season 1 is the Episode IV of Rebels. This episode establishes that season 2 is Episode V.

I think the creators made it clear that Ahsoka DOESN'T fully realize Darth Vader is her old master. But the episode also made it clear that Vader fully knows Ahsoka is still around. And now I want to see them clash all the more.

"…like Applejack pondering about a mentor: 'I thought she was so amazing, I almost forgot how amazing I am!'"