[Ninjinister]

I don't think he's from the comics. DC Wiki and Comic Vine certainly don't seem to mention him. The fact that he's a name so recognizable as a planet from a comic whose main character's origin is a bit similar to Supes' is kind of funny. Also want to know why he makes the rest of the characters look like pixies.

EDIT: There was apparently, a "Nam-Ek" Kryptonian villain, who went under the super-threatening name of "Antibiotic Man". Doesn't sound like he's a super giant though.

http://dc.wikia.com/wiki/Nam-Ek_%28Earth-One%29