Louisville Metro Councilman Dan Johnson is joining a panel discussion in downtown Friday on bringing an NBA team to the city.The roundtable will feature Jefferson County Judge Executive Bryan Matthews and attorney J. Bruce Miller, who has been an advocate for bringing professional basketball to the city.Mayor Greg Fischer has also been a vocal proponent of bringing the NBA to Louisville, but he's faced criticism from University of Louisville officials. Supporters are optimistic, but a study by a pair of media executives outlined how the cost of the NBA outweighs the benefits.From WHAS-11: