Born Kal-El on the doomed planet Krypton, Superman is the gold standard against which all other heroes are measured. Powered by Earth's yellow sun, he possesses near-limitless strength, heat vision that can cut through dimensions, and speed that rivals the Flash. His only real weakness is a glowing green rock—and even that barely slows him down.

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.