Which is funny and makes sense, since I thought I read that the Green Arrow character was originally/historically made (way back in the day) to become another Batman-like character after Batman was such a success. He had an Arrowcave, an Arrowcar, a Robin-ish sidekick (Speedy) and stuff like that.
Interesting...
And it makes sense. In the CW universe, I would find the addition of Batman redundant given all they've done with Oliver, especially after the Ra's al Ghul storyline.