One aspect of the movie that is certain to showcase an abundance of fun, bizarre characters is the gladiatorial arena (the subplot of the movie taken from the first teaser trailer from earlier this week even showed them going into battle against each other, which is sure to be the highlight of the film.

At this stage, we have no real idea about who the other gladiators might be — but it's certainly fun to speculate, and that's exactly what we've done here. So, let us run you through sixteen gladiators we'd love to see in Thor: Ragnarok.

16. The Red King

Now, although we know that the Grandmaster — played by Jeff Goldblum, no less — will be in charge of the gladiator battles in Thor: Ragnarok, that doesn't mean there won't be any space in the movie for the Red King, who was the emperor of the gladiatorial planet of Sakaar and ran the battles in both the Planet Hulk comic book arc and animated movie.

The Red King may still be the planet's overlord, a ruler who simply allows the Grandmaster to oversee events in his gladiatorial arena, and that would be awesome. In the Planet Hulk story, the Red King tires of the Hulk's dominance in the arena and dons his impressive golden power armor and takes on the Green Goliath in a gladiatorial battle. That would be absolutely fantastic to see in live-action (think Hulk versus the Hulkbuster armor, but the man in the armor wants to absolutely destroy him this time, not just put him to sleep).

15. Lavin Skee

Lavin Skee was an Imperial Guardsman who was extremely loyal to the aforementioned Red King. When his master, Ronan Kaifi, was forced to become a gladiator because he spoke out against the Red King's empire, Skee was pushed into the arena as well. His master was killed while training for battle, and Lavin Skee took it upon himself to defend Elloe, his master's daughter, as a result.

Skee died fighting alongside the Hulk and his gladiatorial allies when they were attempted to fight for their freedom. He was subsequently given a hero's funeral by his teammates, and was integral in uniting the gladiators to form the team that would become known as the Warbound. It would be great to see him in live-action as a gladiator in Thor: Ragnarok, as his death and the subsequent coming together of Hulk and his fellow gladiators would potentially hint towards a World War Hulk arc in the Marvel Cinematic Universe going forward.

14. Caiera

Caiera was a former slave to the aforementioned Red King who worked her way up to becoming the Lieutenant of his army. Having previously fought against the Hulk in the gladiatorial arena, she eventually turned on the Red King and allied with the Green Goliath, becoming a prominent member of the Warbound group that he led.

The two eventually married, though she later died while pregnant with his twin sons, Skaar and Hiro Kala. It would be fantastic to see her in Thor: Ragnarok, as her inclusion in the movie could have some epic ramifications going forward — not least in the form of the World War Hulk story arc and the birth of Hulk's two sons, who could go on to be extremely intriguing adversaries of their father in the Marvel Cinematic Universe in future franchise outings. If nothing else, it would be cool as hell to see her wielding her awesome blade in the gladiatorial arena.

13. John Cena

Back in November, thanks to an odd addition to the film's IMDB page, there was a rumor floating around that WWE superstar John Cena has been cast in Thor: Ragnarok. Although it isn't certain who he's playing, rumor has it that he's supposedly been cast as himself. While this might simply mean that there's a scene in the movie taking place at a WWE wrestling event on Earth, we're actually hoping that Cena has a far more interesting cameo than that.

With that in mind, we want to see John Cena in the gladiatorial arena! The concept of the arena (in Planet Hulk, at least) is that the organizers capture and enslave warrior beings from all over the universe to participate in battles. It would be funny, therefore, to see him there because folks who kidnapped and brought him there mistook him for a real warrior, having observed him "competing" at the top of the WWE food chain for so many years.

We'd settle for seeing him play some sort of alien warrior, of course, but if Ragnarok is as much of a comedy as director Taika Waititi would have us believe, an entirely human John Cena getting dropped in the arena against superpowered galactic warriors could get a big laugh.

12. Howard the Duck

Now this would be great. It would make a fantastic ongoing joke if we just kept seeing Howard the Duck in unfortunate situations across the cosmos of the Marvel Cinematic Universe. Having him cameo in the franchise again, this time as a captive gladiator in Thor: Ragnarok — after having previously seen him captive as an exhibit in the Collector's museum in 2014's Guardians of the Galaxy — would be funny as hell. The poor guy!

Perhaps it could be considered revenge on the character for his terrible 1986 movie! Seriously, that movie was absolutely horrific! Howard wouldn't stand much of a chance against the likes of the Hulk and Thor in the gladiatorial arena, but it would certainly raise a few laughs to see him try. Judging by his reaction to seeing the Collector getting his face licked by Cosmo at the end of the aforementioned Guardians of the Galaxy, his reaction to the whole thing would be pretty hilarious, too.

11. Miek

Miek is an insect-like being from the Planet Hulk story arc. Having been captured and enslaved for gladiatorial combat along with the Hulk, Miek was one of the characters who allied with the Green Goliath and went on to form the Warbound with him. As we've already stated, including these guys in some capacity could tease a World War Hulk Marvel Cinematic Universe arc in future, the awesomeness of which cannot be understated. Miek is a capable fighter, but somewhat more timid than the other Warbound , which would add an interesting dynamic to the group.

Miek would look fantastic in live-action, so it would be awesome to see him for aesthetic purposes alone. By association, Miek's fellow insectoid Sakaaran natives — such as Mung — could also him on screen, which would be great. We've already had talking raccoons and giant walking trees in the MCU, so why not giant, talking insects?! Absolutely anything is possible in the Marvel world, and nothing should be unexpected now.

10. Arch-E-5912

Arch-E-5912 — otherwise known simply as Arch-E — is a non-organic android of the lifeforms known as Wildebots. His specific origins are unknown, but it is assumed he was originally a slave to the Red King who ended up in the gladiatorial arena on Sakaar after he revolted against the ruthless leader in some fashion. He became part of Hulk's Warbound group and fought alongside the Hulk against his presumed former leader's regime (and indeed, beyond that).

Arch-E is a skilled pilot and communications bot who could end up being the key to the Hulk returning to Earth. He would add further variation and diversity to the gladiator roster on Sakaar in Thor: Ragnarok, as he would likely be the only robotic character present amongst the gladiators. Most importantly, if the Warbound are going to be a thing in the Marvel Cinematic Universe, it would be a travesty to have them without Arch-E alongst their ranks.

9. Elloe Kaifi

We've already mentioned Ronan Kaifi in this article (he was Lavin Skee's master), so now it's time to get to know his daughter a little better. Ello Kaifi was sent to the gladiatorial arena along with Skee (who served as her bodyguard) when her father spoke out against the Red King's regime. Although she was initially a very weak combatant, Skee trained her when he knew she was going to be forced to fight in the arena, and she became far more adept in battle as a result.

She ended up fighting alongside the Hulk as part of his Warbound group and was one of the more dedicated when it came to bringing the Red King down. She went on to fight with the aforementioned Miek in the arena before the Green Goliath put a stop to all that. It would be awesome to see her character develop from a timid young girl to a badass warrior in Thor: Ragnarok, should she end up being included in the movie.

8. Hiroim

Hiroim was originally a shadow priest on Sakaar who was dedicated to the story of the Sakaarson, the being who would unite the people of Sakaar by bringing down its evil reigning emperor (the chosen one would turn out to be the Hulk himself, of course). Hiroim was expelled from his order for daring to dream that he could actually be the Sakaarson. He ended up being forced to suit up in the gladiatorial arena, where he ended up fighting alongside the Hulk as part of his Warbound group.

After the group brought the empire down, Hiroim accepted that Hulk was the Sakaarson, and seeing that little subplot unfold in Thor: Ragnarok would be pretty cool. When his fellow shadow priests all perished, he absorbed all of their powers, making him a valuable asset to Hulk in the World War Hulk storyline — which, again, we'd all absolutely love to see in the future in the Marvel Cinematic Universe.

7. Korg

The final character from the Warbound that we're including here is the Kronan, stone-like warrior known as Korg (we're not including the No-Name Brood, as the movie rights to her species are owned by Fox). You may currently be screaming at your computer monitor/cellphone that Korg has already been in the Marvel Cinematic Universe — in 2013's Thor: The Dark World, when Thor used Mjolnir to smash a Kronan warrior to rubble — but it wasn't him!

Everyone just seemed to... assume it was him, and he subsequently appeared on MCU wikis as an existing (albeit deceased) character in the franchise. But the rock warrior was never named and, frankly, it could have been any Kronan warrior. Assuming that the Kronan character in Thor: The Dark World was Korg is like assuming any blond, blue-eyed human character is Captain America, which is just silly. If the Warbound are going to be a thing in the MCU, Korg is essential, and it'd be fun to see the Hulk fighting alongside such a cool looking character in the gladiatorial arena regardless. It could be the closest we'll ever get to seeing the Green Goliath fighting alongside The Thing. Damn you, movie rights!