Re: Can Metallo character work in a Superman movie ??
Metallo works well, with his Kryptonite centrism, and being such a base criminal, and a con man at that, he contrasts well with Superman. I don't think he carries a movie well, unless he becomes a lot more like Lex Luthor as far as scheming and suaveness and such, but being someone Superman couldn't save that Luthor could is a pretty cool angle for him.
Get rid of his magic "technology absorption powers" make him more like a modern day cyborg, looking like a terminator with some added coolness. Having him uplink to tech could be cool, but I really don't need to see someone 'absorbing' a 747, whatever that means.