Sakaar is the home-world of the alien hybrid Skaar, Sakaar is a planet that is war-torn, and its culture is about as advanced of the Romans, but their technology they get from people who have died coming through the wormhole to Sakaar. It's natives are insectoids who are in conflict with pinkies about who is the real native species.
Sakaar was created by writer Greg Pak and artsist Carlo Pagulayan and first appeared in Incredible Hulk Vol.3 issue 92 (2006). Natives of the planet Sakaar are, among others, Elloe Kaifi, Hiroim, Caiera, Skaar, Miek and Lavin Skee .
Major Story Arcs
Some time ago, the planet mystriously returned in space. Without any acknowledgement of it's destruction, Amadeus Cho (the Totally Awesome Hulk) was stranded on the planet and forced to fight as a gladiator by the new ruler. Many months later, it was revealed that one of the Infinity Gems, the Time-Stone, lay on the planet's ground, which was also the cause for the return of the planet Sakaar.