Do we know if superpowers exist in this universe? Or is it like the Dark Knight universe where powers don't exist?
No indication so far, but they seem to be keeping to non-powered villains if that's any indication. Doesn't mean powers couldn't be introduced at a later point.
They may name drop a super powered character long before we see one. "Superman doesn't have to put up with this
I wonder what they would do with Black Canary then?
Also, are they really going to make Speedy (Red Arrow), his sister? That just seems odd.