Board Thread:General Discussion/@comment-26373999-20170331110735/@comment-24152851-20170519001912

They typically introduce the protagonist's "dark mirror" first, like Malcolm Merlyn for Oliver, or Eobard Thawne for Barry. If they can make Hector a perfect antithesis, then they can go for it.

I know Slade and Green Arrow have fought before, but he was never Ollie's arch-nemesis. Their conflict was never as personal to the level as it was on Arrow. Slade sure as hell didn't train Oliver Queen before he became a superhero.