Re: Can Metallo character work in a Superman movie ??
I wouldn't mind, but I can see where people don't want Kryptonite back, though...maybe give him robotic parts made from Kryptonian technology salvaged from Zod's attack, as a government-made deterrent against any further Kryptonian hostilities.
"My folks came to the U.S. as immigrants, aliens, and became citizens. I was born in Boston, a citizen, went to Hollywood and became an alien."