Green Arrow. Vol. 6, Trial of Two Cities

"Unwilling to let another city suffer the same fate as Seattle, Green Arrow kicks off a new quest to hunt down the Ninth Circle across America! To stop disaster before it can happen, the (in)famously hot-headed Oliver Queen must mend fences with those he's alienated in the past, including Batman, Superman, The Flash, Green Lantern, Wonder Woman and the Justice League!"-- Provided by publisher.