After the DC Comics event DC K.O., Air Wave, Kid Flash, and Stargirl came across two villains named Girder and Tarpit. It’s understandable that the heroes wouldn’t trust their enemies, but Girder and Tarpit had a point, and the Justice League agreed. Among the people to join them was Lex Luthor, who continues to bump heads with Batman over how he goes about things. In Justice League Unlimited No. That's why my guess is that someone within the Justice League is on Darkseid's side.