Two weeks after dropping a billboard inside the Atlantic Yards footprint, the Knicks have added another, on Flatbush Avenue, just south of the Barclays Center construction site...and this one leaves no doubt the Nets' move to Brooklyn is the target. The new billboard expands on the "You, Us, We, Now" theme. "You" is "The Republic of Brooklyn" while "Us" is "The Original Ball Team of the Empire State." Subtle? No.