Stand Down!
The early bird gets the worm,and Zartan's early presence gives him the upper hand and dibs on the sleeping Manhunters.He convinces the Justice League and paints the Joes as a sneaky,no good, underground affiliation with bad intentions.Especially the one dressed In black and armed to the teeth.Supes and co. get in between Duke and Snake Eyes while Zartan makes a clean get away.The Joes wisely step aside ,fearing a confrontation with the likes of a super powered team like the Justice League ,but manage to discreetly launch a reconnaissance drone to track Zartan's whereabouts.