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 What If? A special issue of What If? featured three alternate versions of Planet Hulk: The first story shows the Hulk sacrificing himself to save Caiera by throwing her into the planet's orbit. Caiera survives and upon returning to Sakaar, she is met by the Warbound who learn of the Hulk's death while Miek is killed trying to find the Hulk. Caiera absorbs all of Sakaar's energy, becoming more powerful than ever, before heading to Earth with the Warbound. Doctor Strange and the Sentry intercept the ship, but Caiera uses the captured Black Bolt to vaporize them. Caiera then attacks the Fantastic Four, killing Reed Richards and eventually Iron Man. The Avengers attempt to fight her, but Caiera easily defeats them as well. Caiera then proceeds to kill the remaining heroes, but Hiroim stops her, pointing out that the "guilty have paid" and that if she wipes out everyone on the planet, no one will be left to honor the Hulk. Caiera agrees to stop fighting, but remarks that "they'll wish they were dead". Twenty-one years later, Caiera now rules earth and has enslaved humanity, while her son, Skaar, has erected a colossal statue of her late husband. The second story involves the Hulk landing on the planet that the Illuminati had promised him, instead of Sakaar. The Hulk begins to coexist with the creatures and finds life on the planet to be more peaceful than on earth, whilst being involved in a personal struggle between himself and Bruce Banner. Years pass, and the Hulk's actions have caused the planet's evolution to take a turn and centuries later, intelligent, humanoid beings now inhabit the planet and most consider stories of the Hulk to be only a legend. One young boy, however, sees the Hulk, who is now smaller, more "native" to the world, and at peace. In "What If Bruce Banner Landed on Sakaar Instead of the Hulk", Hulk's shuttle lands on Sakaar,