• Australian actors and brothers Chris Hemsworth, Luke Hemsworth and Liam Hemsworth at the premiere of 'Vacation' on July 27, 2015 in Westwood, California.

Australian actors and brothers Chris Hemsworth, Luke Hemsworth and Liam Hemsworth at the premiere of 'Vacation' on July 27, 2015 in Westwood, California. (Photo : Getty Images/Jason Kempin)

"Thor: Ragnarok" is already stirring a lot of buzz way before its November 2017 premiere. The Chris Hemsworth-starrer is adding more of A-list actors on its cast list, and is introducing more realms in the Marvel Cinematic Universe. In a Facebook Live chat, director Taika Waititi teased the role of a new character in the movie.

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Waititi gave fans a virtual tour of the "Thor: Ragnarok" set, which he described as a "sci-fi space wasteland," wherein Hemsworth and co-star Tessa Thompson also appeared in the video in full costume. Minutes into the video, the director mentioned an actor named Steve, whom many presume to be playing Miek - a key character in the "Planet Hulk" comic book storyline.

"[You] can't say anything about where we are, and you can't tell anyone about what you've seen," Hemsworth told during the Facebook Live audience about the big reveal. The cast and the director even joked that they may "get fired" after this.

According to The Hollywood Reporter, Miek is an alien who teams up with Hulk in order to overthrow a cruel regime that forces slaves to fight in gladiator-style battles to survive on the planet Sakaar. The only difference between the comic and movie versions of Miek is that the character is portrayed as human in the movie. The addition of another "Planet Hulk" character further supports the theory that "Thor: Ragnarok" is based on the said comic.

According to JoBlo, the third "Thor" film may be a lose adaptation of "Planet Hulk." In the film, Thor and Hulk will clash in one of the gladiatorial games orchestrated by Jeff Goldblum's character, Grandmaster, one of the Elders of the Universe. Interestingly, Hulk gets a major upgrade in his appearance as he will be sporting a one-shoulder armor similar to that in the comic book, and will also be armed with weapons.

The main gist of the "Thor: Ragnarok" storyline is that he needs to find the ultimate weapon that will stop Ragnarok and thus reset time, which means an even massive storyline involving various other worlds.

"Thor: Ragnarok" opens in theaters on Nov. 3, 2017.

Watch "Thor: Ragnarok" leaked teaser trailer below: