Hey another Prankster fan!
Yeah Busiek cracked that character to me. Basically keeping him as the Silver Age elaborate trap-maker who sells himself out as a distraction for hire is a fantastic villain. His goal isn’t to kill Superman or conquer the world, it’s just to keep Superman occupied long enough so that his employers can pull of their crimes while Superman is busy. I love that idea!
Sadly no, we still get stories where Metallo is just a dumb thug (mostly in anthologies though), and no one has really cracked Metallo despite multiple writers adding great ideas and concepts to him. He still hasn’t had that one story that brings everything together and shows why he’s cool and worth keeping around, despite multiple great writers using him.
Johns was the one to revamp him as a soldier, the government’s initial Anti-Superman weapon when they weren’t sure what his intentions were. That was an absolute
fantastic idea, one of Johns greatest.
During the New 52, Morrison played up his more sympathetic aspects. That he also desired Lois’ love alongside Clark, and actually became Metallo in part to protect her and the rest of the planet from the Superman “threat”. That the military used him as a human weapon afterwards. That he was addicted to Kryptonite. There’s a lot of great ideas at play here.
Personally I think the way to go with Metallo is to make him the embodiment of the darker side of the American war machine. The way soldiers get used and tossed aside by their superiors. Rather than just have him out to kill Supes or steal money (both pretty banal stories that don’t really utilize him to his full potential imo), Metallo should be gunning for Sam Lane and maybe even the American military higher-ups/government as a whole, with Supes having to stop him while also sympathizing with his pain. I think that would be the way to finally unlock his potential.
It’s a pity PKJ probably isn’t going to use him, because I think a guy who’s serving in the armed forces right now might have some interesting insights into how Corbyn could work.