WARNING: The following article contains spoilers for King in Black: Thunderbolts #2 by Matthew Rosenberg, Juan Ferreyra and VC's Joe Sabino, on sale now.
In the face of Knull's invasion of Earth, the Kingpin has assembled the Thunderbolts, a Suicide Squad-esque team of villains looking to do a little good. Even their mission is insanely dangerous, with some of their members leaving or being killed within the first issue.
While that might seem grim, King in Black: Thunderbolts #2 adds a bit of macabre humor to their mission. Using Star, they located the remains of the Sentry, Marvel's version of Superman. Specifically, they located his bottom half, which fell to Earth after Knull ripped I'm in two. According to a plan from Norman Osborn, they can use the latent energy still inside Sentry's legs and butt as a weapon against Knull.
Sentry having a great deal of energy still stored in his remains is a source of hope for many following the symbiote god's return. Theoretically, the Thunderbolts could find a way to weaponize the power in the Sentry's bottom half as an unmatched source of energy. While the Sentry is strong enough to fight Galactus to a stalemate, there's a lot of ambiguity regarding whether a portion of his power is enough to defeat Knull.
The Sentry is one of the most powerful beings in the Marvel Universe. If he lost the fight against Knull, then there is a good chance he tried using his full power to stop the ancient deity, which just raises the uncomfortable implication about how powerful Knull truly is.
It's incredibly unlikely that this absurd plan of theirs could work, and even the villains present have serious doubts about how this would work and how they could survive it if they did. However, there's still some precedent for using the bodies of dead Marvel Universe powerhouses, including from the Celestial that became Knowhere, the Watcher's eye being a source of great power and insight in Marvel's Original Sin crossover and the Fantastic Four using Galactus' corpse as a battery for Nu-World.
While desperate times call for desperate measures, the Thunderbolts might have bitten off more than they can chew. While the rest of the Marvel Universe is focused on more conventional ways to take down Knull, this bold plan could end up with the Sentry's butt exploding in Knull's face, which would certainly give this Marvel epic an original ending.