Tony Stark can defeat anything and everything with prep time in a cave. With a box of scraps, no less!
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My issue with the inconsistencies of the DC comics universive when concerning BatMan is there are actually two versions of the character, there's the street level vigilante who struggles to deal with his mostly non superpowererd rouges gallery and then you have the Justice League superhero who can hold his own against villains that could give Superman a run for his money.