Does anybody here watch "Arrow" on the CW?

If so...what's the deal with Black Canary? She's not Laurel obviously due to this past episode.

"We have a really great story arc for the Black Canary and Laurel that we’re super excited for people to jump on board that ride, because it’s really just the beginning," -Executive producer Andrew Kreisberg.

But this quote kinda shows that they're connected somehow.

I'm just lost now I don't see where this is going :'(