Re: Can Metallo character work in a Superman movie ??
Yes. In fact I'd put him in the top 5 potential villains to use after Zod:
(that is assuming Darkseid is reserved for a JL film)
2014 Cinematic Adventures:
Noah | Captain America: The Winter Soldier | The Amazing Spider-Man 2 | Godzilla | X-Men: Days of Future Past | Dawn of the Planet of the Apes