Action Comics Vol. 1 (1938-2011; 2016-) #1042

Plot

The origins of Mongul, his mysterious champions, and Midnighter's underground rebellion stand revealed! When another of Superman's truest allies is killed, will the tragic loss end the rebellion before it begins? Or will it be the spark that finally unites Superman's forces against the unstoppable Mongul? The Warworld Revolution begins! Also featuring the finale to the epic Martian Manhunter backup series!