The three villains appear in the Tower of Fate. Black Adam noticed the other two arguing before, but wanted to see it play out. He needed to see how far they would push each other; perhaps they could keep each other in line so he would be free to go about planning the Alliance's deeds.
"Now then, who shall we retrieve next? With Deathstroke on our side now, the lesser heroes can be taken care of with ease. But make no mistake; they will not sit by idly waiting for us to destroy them one by one. Sooner or later, they will pull together and gather their strength. There is no way around it. We will eventually have to face them at full strength, presenting a united front against us. Therefore, I believe that we need more power.
"Mordru, you and I are both forces to be reckoned with, but there are greater still in the universe. I propose that we recruit Ares, the Greek god of war. I have heard tell in my search for allies of trouble on Themyscira, which reminded me that one of Ares' goals has always been eliminating Wonder Woman. She is a major obstacle to his power, but, fortunately for us, she is also counted among Earth's heroes. The prospect of her death should be enough to sway him to our cause, and who better to back us than the god of all conflicts himself? What say you two?"