I'm so glad this was finally announced!
My prediction for the first episode: Optimus actually used the Star Saber to cut off his own arm to close the ground bridge right after he went through it. So, he is out there somewhere alone missing an arm and leaking energon...hence "Optimus struggles to survive."
My hope for episode two: That the Predacons are introduced in the first episode since there will only be thirteen overall. I'm crossing my fingers that "while the Decepticons welcome a key player to their ranks" isn't just the first emergence of Predaking that was shown in the trailer. Again, since this series is Beast Hunters the beasts had better be in every episode out of the gate (IMHO)!
Maybe the "key player" is the side-switcher...like Ratchet?
Also, does anyone think or expect the season to follow the "Tales of the Beast Hunters" snippets found in the BH toy instructions? I have mixed feelings about these bios/stories.