There’s no memorable Decepticon-only scenes with the leftover characters in MTMTE part 2 after scrolling past the Youtube upload. They may just make the filler set like you mention.Unless Part 2 ends up being just a set to finish off the remaining named Decepticons from "More Than Meets the Eye, Parts 1-3" who haven't yet been given the Dramatic Capture treatment, which I guess would be Skywarp, Ravage, and Blue Frenzy/Rumble. Maybe they could add in Buzzsaw and Red Rumble/Frenzy to bulk out the set and round out the initial 1984 lineup.
Creamy chocolate and nougat only with Takara version