Yes, Thamosgem is already covering this, but he posted on the Wikia updates instead, so I'll be the one covering here. Heres a link to Thanosgem's discussion just in case: https://steven-universe.wikia.com/wiki/Thread:928379 . So anyways, Cartoon Network Latino aired not only the trailer for Escapism, but also Battle of Heart and Mind. The Roundtable made a video, which I saw. I then watched the BOHAM Trailer. After finishing watching the trailer, I think what will happen next is is based on the trailer:
Stevonnie unfuses and discuss how to get out of here asap. Than Steven realizes that he can contact Lars, so he falls asleep and successfully contacts him and the off colors. Then Steven wakes up and is on trial by the Diamonds for defection and fusion. Steven decides to play along and accept his fate. While Yellow Diamond agrees, Blue Diamond wants to pardon 'Pink', and it causes a fight between Yellow Diamond and Blue Diamond. Steven Universe and Connie Maheswaren escape in the process, bringing the gemstones of the Crystal Gems with them, so White Diamond mind controls Yellow Diamond and ends the fight in order to prevent Steven and Connie from leaving. Yellow snaps out of it and helps Steven and Connie escape. So White Diamond controls Pinks ship.
Now the next part is based on what I think would happen next after the trailer scenes:
White Diamond also controls Yellow and Blue Diamond's backup arm ships and prepares to destroy her fellow diamonds. Then The Sun Incinerator arrives and attacks the diamond megaship. Lars and the off colors rescue Steven and Connie. Then, the Crystal Gems reform. They reform and fight (With Yellow Diamond and Blue Diamond) against White Diamond. While Yellow Diamond and Blue Diamond distract White Diamond, Steven and his allies flee into the Sun Incinerator and fly off. White Diamond is so PISSED, she scars and whitens both Yellow Diamond and Blue Diamond, thus bringing them into her control. White then vows to destroy Steven, Connie,the Crystal Gems, Lars, and The Off Colors. Meanwhile, the Crystal Gems and The Off Colors celebrate. All of the members of the off colors are accepted as Crystal Gems and they all head to earth...