As predicted, here's the uploaded trailer, with translations!
Translation:
Steven: When Connie and I where on the jungle moon, we saw something, a vision, of a Pink Diamond
Voice (prob Blue D): The colony will be done as long as you are there to rule
Eyeball: I saw Rose Quartz, leader of the Crystal Gems, shatter Pink Diamond
Steven: When Blue Diamond came to earth, I had a dream where I was her and I cried her tears…
Blue D: Prove them that this little inconvenience doesn’t affect you
Zircon: So, how did a Rose Quartz that couldn’t get nearby Pink Diamond could have gotten so close to her?
Steven: If I am having the same dreams about Pink Diamond, what if that means that she is still out there?
Voice: This Rose Quartz cannot hurt you
Pearl: There’s some things that I cannot tell you
Lars: *I didn’t understand, sorry*
Steven: I…. I don’t know
Garnet: everyone looks at me asking for answers, I cannot handle it
Garnet: Come closer, let me tell you guys the real story about Rose Quartz
Pearl: I wanted to tell you a long time ago….
Mayor Dewey: And then I’ll go out! OoOoOoh!
Twitter: Emerald