Billionaire orphan Bruce Wayne channeled grief into becoming the most dangerous non-powered human in the DC Universe. Armed with a utility belt, a cave full of cutting-edge tech, and contingency plans for defeating every member of the Justice League, Batman proves that preparation trumps superpowers. He doesn't need to be the strongest in the room—he just needs to be the smartest.

The Mad Titan of Marvel's cosmic hierarchy, Thanos is obsessed with universal balance and willing to snap half of existence out of reality to achieve it. Even without the Infinity Gauntlet, he can trade blows with the Hulk and outthink Reed Richards. With it, he is essentially God—capital G—with a chin that could cut diamonds.