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Writer: Peter J. Tomasi
Artist: Scott GodlewskiIt's the runaway train from hell! Superboy and Robin better hold on for dear life as they ride a 20-megaton cosmic engine of mass combustion (that's a pun!) into their final battle with Rex Luthor! But Rex has got a brand-new army of shiny young super-villains ready to conquer all they survey...will the son of Batman and the son of Superman be enough to stop him?