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human
[Justice League Unlimited] Would Mongul actually be able to take over Earth?

In "For the Man Who Has Everything", Mongul plans to conquer Earth and traps Superman in the Black Mercy. While fighting Wonder Woman, he mentions that Superman was the only obstacle in his way, and everyone else was "already dead". Batman later seems to affirm this, telling Superman that Mongul will kill Wonder Woman, and then all of them.

But, would he be able to? At this point, the Justice League has basically an army of superheroes, including one other Kryptonian (Supergirl), a Martian, a Green Lantern, and several magic users. Several of them, including Captain Atom and Captain Marvel (who wasn't part of the League at that point, but probably still an active hero) were able to give Superman a good fight, even if they eventually lost. Mongul is probably individually stronger than them (since he basically crushed Wonder Woman) but if the entire League attacked him at once, would he really be able to defeat them all?
gpt
No, not a chance. If Superman can beat him, then Martian Manhunter and Supergirl working together can also almost certainly beat him, or any other number of combinations. Batman is just trying to snap Superman into action, and Mongul is completely unaware of what he would be bringing down on himself if he killed Superman.