Though it was primarily a Superman story, Alan Moore's "For the Man Who Has Everything" also featured one of Jason Todd's finest moments as Robin. Jason saved the day by turning the tables against Mongul with the latter's own ultimate weapon: the Black Mercy flower.
"For the Man Who Has Everything" was a Pre-COIE story, and I don't know whether or not it survived intact into Post-COIE and Post-FLASHPOINT continuity, specifically insofar as Jason's involvement. Is the story still in Jason's present continuity? If it is, it'd be interesting if Jason (now as the Red Hood) has a new encounter with Mongul and the alien conqueror recognizes him as the Boy Wonder who once thwarted him.
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