Buildup When a Gamma bomb causes the
Hulk to lose control and attack Las Vegas, the
Illuminati decide the Hulk is too dangerous to remain on Earth. With the help of the Hulk's friend and psychiatrist
Doc Samson, they trick him into entering orbit to destroy a rogue satellite, and then use a shuttle to jettison him from the
Solar System. They intended for him to land on a peaceful planet, but the shuttle passes through a wormhole on its way.
Main storyline at an October 2025 signing for
Return to Planet Hulk #1 at
Midtown Comics in Manhattan As Hulk listens to a recording from the Illuminati explaining their actions, his shuttle crashes on the planet
Sakaar. Weakened from the crash, Hulk is fixed with an obedience disk and taken into slavery. He is forced to fight gladiator battles for the planet's emperor, the
Red King. Hulk forms a "
Warbound" pact with his fellow gladiators
Miek, No-Name
Brood,
Elloe Kaifi, Lavin Skee,
Hiroim and
Korg. Hulk becomes a popular hero for his actions in the arena, and a group of insurgents try to recruit the Hulk to their cause. The Hulk declines, but Elloe chooses to go with the rebels. During their next gladiator fight, Lavin Skee is killed. As the others come closer to winning their freedom, the Red King's lieutenant,
Caiera, arranges for them to fight the Silver Surfer, who is also controlled by an obedience disk. During the battle, the Hulk breaks the Silver Surfer's disk, freeing him. After the Hulk and Warbound refuse to kill a captured Elloe alongside two other rebels, the Silver Surfer then destroys all the obedience disks of everyone in the arena. As he leaves Sakaar, he offers to return Hulk to Earth. Hulk chooses to stay behind. The Hulk and his Warbound, now re-joined by Elloe and on the run from the Red King, are hunted by Caiera. As they travel through villages, Hulk finds followers who believe he is the foretold savior, "Sakaarson". Hulk denies this title. Caiera finally confronts the Hulk, but their battle is interrupted by an invasion of "spikes" that cause monstrous mutations and death to anyone they touch. Caiera calls the Red King for assistance and learns that he ordered the spikes to be deployed there. Horrified at what her king has done, Caiera joins the Hulk. Hulk leads a raid on the Red King's capital, culminating in a one-on-one battle between the two of them. The Red King is defeated, and Hulk is named the new king. He takes Caiera for his wife, and the two broker peace among the various conflicts which had festered under the Red King. Caiera becomes pregnant with Hulk's child. Meanwhile, the shuttle that brought the Hulk to Sakaar is being turned into a monument. As part of its self-destruct sequence, the antimatter
warp core engine detonates in a massive explosion. The whole city is destroyed, and Caiera dies. Enraged and blaming the Avengers who built the shuttle for the damage, the Hulk and his Warbound leave Sakaar and head for Earth.
Aftermath Arriving on Earth, Hulk and the Warbound begin
World War Hulk. Sakaar rebuilds after the explosion with the help of the Hulk's two surviving sons,
Skaar and
Hiro-Kala. ==Other versions==