Originally Posted by craigdbfan
Like Bizzaro (Post Crisis) he would initially be created by Luthor (in this case with a Project Cadmus funded by him) to replace the real Superman and to ultimately destroy him. So he would just be Bizzaro only in motive in terms of intent. In terms of looks and ultimately personality he'd be more like Kon-El.
The Bizzaro aspect would mainly be used to alter his reason for existing. The character would mainly follow the Kon-El storyline though (with alterations borrowing from Bizzaro's origin).
You got 2 out of 3 of the combination of what I wanted to see for Superman2. I want Lex, Bizzaro/Metallo and Brainiac. Brainiac would be the main threat, coming to Lex in a weakened state, and he is giving him the knowledge to construct a new body for him, and in return he would kill Superman.
Metallo/Bizarro would be constructed as a prototype for Brainiac's body, and becomes the corporate competition for Superman, the Bizzaro/Metallo would become genuinely inspired by Superman over the course of making saves with him, but being a defective prototype their mind and sanity begins to dissolve, becoming a dark twisted image of Superman. All the while Brainiac slowly regains his strength and launches his attack.
Then Luthor would take the mainstage in Superman3 based largely off All-Star.