'Thor: Ragnarok' movie release date, plot details and spoilers: Final Infinity Stone, the Soul Stone makes its way into film?

"Thor: Ragnarok" is another upcoming Marvel Comics-based superhero movie, which stands as a sequel to "Thor" (2011) and "Thor: The Dark World" (2013), and is slated for a Nov. 3, 2017 release date.

Along with the character Thor (Chris Hemsworth), the Hulk (Mark Ruffalo) and Stephen Strange a.k.a Doctor Strange (Benedict Cumberbatch) are reported to possibly appear in the upcoming "Thor: Ragnarok" movie. Hemsworth also teases fans by introducing new realms into the Marvel Universe.

In the recently released "Doctor Strange" movie, Marvel fans already long decoded a T.H.A.N.O.S. theory with the "N" revealed as "Necklace," which referred to the Eye of Agamotto that was revealed in the movie.

All the other letters are revealed except "H." T stands for Tesseract, A for Aether, O for Orb and S for Scepter.

Now fans are speculating that "H" might be revealed in the upcoming "Thor: Ragnarok" movie with Cate Blanchett cast as Hela, the goddess of the spirits of the dead, who is also speculated to manipulate spirits and souls through a Soul Stone.

The Soul Stone and other Infinity Stones had been possessed by different other Marvel characters in the past, and it is possible that the upcoming movie tasked Hela to be the bearer of it this time.

Further speculations also suggest that Hela will lose her Soul Stone to Thanos in the upcoming movie.

Others also speculate that the "H" might be Heimdall, played by Idris Elba. Heimdall is also known to be a bearer of a Soul Stone because he has the ability to see souls who reside in the Nine Realms. However, since he can only see but not control these souls, this theory seems unlikely.

"Thor: Ragnarok" also stars Tom Hiddleston as Loki, Anthony Hopkins as Odin, Tessa Thompson as Valkyrie, Jeff Goldblum as Grandmaster, Karl Urban as Skurge, and Sam Neill in a still unnamed role. The movie is directed by Taika Waititi, who also helmed the previous "Thor" movies.