This would be a good cheap idea for CW. Not a lot of FX needed for a guy with a bow and arrow. Now will they have Black Canary as the love interest is the question? And even bigger is who will be the big bad on the series? A hero is defined by the strength of the villians he fights and Green Arrows rogues gallery is not very large or well known. But if DC handles it right I will watch.
They could use some from Barry's (Wally's) Rogue Gallery, setting up a cool Flash tie-in.
And GA was mostly associated in the comics with Hal. Hmmmm