This is very interesting in the way that it plays mix-and-match with some 'first meetings', yet plays absolutely straight with others. For instance, this 'Atoman' is a dead ringer for 'Power Man' (no relation to the Marvel character) who made his one and only appearance in the story with the Kryptonite gun. In that story, he was a robot that Superman created and 'teamed up' with to keep Batman and Robin from being killed by Lex Luthor's destructive new invention. That's referenced here, where Batman says "you're a robot, all right!" but this story makes him an actual - and different - character, thereby paying homage to the earlier story without making it just a simple retelling. It's very nicely handled.