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I'm guessing the next one revolves chiefly around the Executor, Luke, and the Snob, while advancing the Plot Hole part more slowly and resolving whatever may be left for Turl and Zod. Then the final part focuses on the Plot Hole, Ma-ti, the Critic, and Film Brain.
Somewhere in there they also have to explain the mystery helmeted guy (who I had honestly forgotten existed until he popped up in this part). And have the real Linkara show up, since they made a point of showing him escaping from the closet Mechakara threw him in. I'm betting the latter has him arrive in Comicron 1 to help finish either Turl and Zod or the Death Bomb, so I'd wager that'll be in the next part. Helmeted guy might also be, but I'm betting he's more connected to the Plot Hole part, so I'd expect more of him in the ending portion.