Rumors are suggesting that Hercules will be the main character of Marvel's Eternals movie, but after Thor's character transformation in Thor: Ragnarok, there may not be room for both Thor and Hercules in the MCU. Adding Hercules to the movie would be a major deviation from the source material, since his comic book counterpart isn't actually an Eternal. Instead, Hercules is an Olympian god. A potential problem with the Prince of Power joining the MCU is that in a way, Thor: Ragnarok has already given the MCU a character like Hercules.

Last April, it was confirmed that Marvel Studios was officially developing an Eternals movie. Directed by Chloe Zhao, The Eternals is expected to feature one of the Marvel Universe's oldest races. The Eternals are a species of immortals who have shared the Earth with humans for millions of years. Casting breakdowns have revealed that the movie will include several Eternals from the comics, such as Ikaris, Sersi, Starfox, the Forgotten One, and more.

Related: Angelina Jolie in Talks for MCU Phase 4 Movie The Eternals

Last November, it was reported that Marvel is looking to cast a male actor for the role of a "Greek God" in The Eternals. Based on that description Hercules, seems like the most logical fit.

Marvel's Hercules is a unique take on the Greek demigod. The classic Avenger and longtime rival of Thor isn't just known for his adventures with the Avengers and the God of Thunder; he has headlined his own comic book series on multiple occasions. Hercules is one of the few key members of Earth's Mightiest Heroes who hasn't been introduced to the Marvel Cinematic Universe. However, though Hercules certainly deserves a place in the MCU, his presence may no longer be necessary, thanks to Thor: Ragnarok.

Despite the fact that the comic book versions of Thor and Hercules are immensely powerful immortals, the two couldn't be more different when it comes to their personalities. Hercules is a lazy, heavy-drinking, fun-loving womanizer who approaches his adventures with a laid-back attitude and a sense of a humor. Thor is a proud and noble warrior who takes his duties as the son of Odin and an Avenger more seriously than Hercules, who enjoys a good fight and basking in the glory of his victories. So while there's a clear distinction between Hercules and Thor in the comics, the same can't be said for Hercules and the MCU's Thor -- at least not since the character's third solo film.

Thor: Ragnarok rejuvenated the franchise by infusing the film with a much more humorous tone than what was seen in the first two movies. This change was also evident in the characters, particularly Thor, who showed a different side of himself by cracking jokes and creating a great deal of comedy relief with his interactions with Loki, Hulk, and Valkyrie. He was no longer the serious, brooding warrior from the previous Thor and Avengers movies. Interestingly, director Taika Waititi's take on Thor reminded many comic book fans of Hercules. Based on the comics, it does seem likely that a movie with Hercules as the main character would end up being tonally similar to Ragnarok.

Thor: Ragnarok blurs the line between Thor and Hercules in a big way by taking away the things that separate them. At this point, if Marvel introduces a comic book accurate Hercules to the MCU, it's hard to say if he'll be as unique as his comic book counterpart.

More: Every MCU Movie Coming After Captain Marvel

Key Release Dates