Vartox is described as “an alien convict, who has been hiding on Earth for the past twelve years. After Supergirl’s emergence on Earth, Vartox seeks her out to ascertain her identity and do battle with her.”
This news was originally reported on at IO9 from an “unnamed source.”
You can see his original comic book below. We are assuming it won’t be adapted that way for television. We are also assuming this is the character people called “The Lumberjack.”
Thanks to Andy for the heads-up.