Director Taika Waititi has confirmed that the planet - which is a home to refugees from other worlds due to its location next to a wormhole in space - will be vital to the new movie, which stars Chris Hemsworth as the titular hero.
Speaking to Total Film, he said:" Sakaar was just an insane, far-off, futuristic place which was the biggest shift for the film and these characters...I was really excited when Kevin [Feige] and the rest of Marvel jumped on board with the idea to use [Jack] Kirby as a big influence in the design of the film. What's really hard is staying authentic."
The movie will see The Hulk (Mark Ruffalo) try to help his Avengers teammate with a huge threat looming over Asgard.
And in the 'Planet Hulk' comic storyline, Sakaar is where Thor reunites with The Hulk.
Meanwhile Taika recently insisted he wanted to make an "awesome" standalone film so did not pay much attention to 2011's 'Thor' or 2013's 'Thor: The Dark World', and admitted he has "no idea" whether his motion picture with blend with the first two.
In a Reddit AMA, he wrote: "I made an effort to ignore the fact there are other Thor films.
"I honestly know NOTHING outside of what I'm doing. I'm trying to ignore the rest of the universe and just make my own awesome movie.
"It will be a nice addition to the Taika Waititi box-set though. (sic)"