Warning! Spoilers for Thor #26 by Marvel Comics
In a stunning transformation to counter Thor becoming the Hulk, the Hulk has received a god-powered upgrade and becomes the new God of Thunder. In Thor #26 by Marvel Comics, Bruce Banner and Odin decided to join forces to stop the Thor-Hulk combination hero. The result is Thor officially being replaced by the Jade Giant, who ends up stealing his hammer Mjolnir and turning into a new kind of hero.
Thor and Hulk's strength and powers have collided in Marvel Comics' 'Banner of War crossover,' as the Asgardian hero attempts to bring Bruce Banner to justice for a deadly incident where many innocent lives were lost. However, after tracking down the Hulk, and Iron Man showing up to the fight with a Celestial Hulkbuster armor, Thor turned into his own version of the monster after the Jade Giant's powers lost control and a Gamma explosion transformed him. Now, to fight back against Thor-Hulk, Hulk is becoming god-powered and wielding Mjolnir with Odin's assistance.
In Thor #26 by Donny Cates, Martin Coccolo, Matt Wilson, and VC's Joe Sabino from Marvel Comics, Hulk tries to take on the Hulked-out God of Thunder, quickly finding out the combination hero's powers are supercharged. After Thor-Hulk takes down the real thing, Bruce Banner gets some help from Odin inside the Engine Room. The spirit of Odin tells Banner that Thor-Hulk is killing him, leading Banner to ask for a favor: make him worthy of Thor's hammer and give him a god-powered upgrade. Odin eventually relents, as Hulk turns into Thor.
The Hulked-out Thor is shocked to see Hulk wield Mjolnir and transform into his version of the God of Thunder. The pair immediately lunged at each other, with Thor-Hulk's hand smashing into Mjolnir, causing an explosion so powerful it left the planet they were fighting on completely leveled. Ultimately, Odin's god-power upgrade for the Hulk and Bruce Banner might be the only thing capable of stopping Thor-Hulk. Is Hulk worthy? It's unclear. Odin likely changed the enchantment on Mjolnir to make him able to lift it and transform. Regardless, Hulk is the new Thor.
Donny Cates and co. are having fun with the story, as they are taking Hulk vs. Thor to an all-new level by transforming them into each other's roles. Thor-Hulk seemed unstoppable, but with Odin's god-powered upgrade to the Hulk, the Mjolnir-wielding hero might be able to stop the monster he accidentally created. Readers can see Hulk's Thor upgrade in Thor #26 by Marvel Comics, which is in comic book stores now.