Once on Sakaar, the Hulk is forced to fight in the gladiator arenas. He forms alliances with fellow gladiators, including insectoid warrior Miek, the Kronan warrior Korg, and Elloe Kaifi, a former shadow warrior. Together, they lead a rebellion against the Red King, the tyrannical ruler of Sakaar.
During the rebellion, the Hulk discovers that the planet's resources are being drained to power a massive spacecraft, which is intended to be used to conquer other worlds. The Hulk decides to take control of the ship and use it to return to Earth and seek revenge on the Illuminati for betraying him.
However, before he can leave Sakaar, the Hulk must confront the Red King in one final battle. The Hulk emerges victorious, with the help of his allies, and commandeers the spacecraft. But just as they are about to take off, the ship explodes, seemingly killing everyone on board.
In the end, the Hulk is shown to have survived the explosion and is floating in deep space, setting the stage for the events of future Marvel movies.