User blog comment:Rassilon of Old/Young Justice spoilers at Comic-Con 2012/@comment-130.18.122.66-20120906204635/@comment-5454370-20120912094226

I'd much rather take on metallo then take on superman if they're both going all out (for superman all out equivalent to metallo ruthlessness:see Superman vs elite). Metallo may be a tank but he's not invulnerable to anything not specifically designed as a weakness for him(+magic)