"Assault on the Hive" is an odd episode. It's Skeletor's only post-Christmas Special Filmation appearance. James Eatock's book has its script being finished on April 23, 1986, but according to Wikip[edia She-Ra's second season was divided into just 14 episodes each for Fall 1986 and 1987, meaning it didn't air until 28 November 1987, months after the MotU movie was nailing the universe's coffin shut.
While it was in production way too early to promote any 1987 Evil Warriors, it had a belated attempt to shill MotU toys as well as PoP ones, with the only Filmation appearance of Meteorbs (Dinosorbs and Comet Cat only).
Skeletor's plot is to seize a starship and enslave the thousands of bee people living on it, which he thinks will be an army large enough to "conquer Horde Prime himself". This picks up from his last appearance, where he burned his bridges with Horde Prime with a Havoc Staff blast to save two Earth children.