Roman Reigns has sustained his dominance over the SmackDown roster for over a year, reigning as the Universal Champion.
Ever since returning to WWE with a new demeanor, he has laid waste to names such as Finn Balor, John Cena, Daniel Bryan, Edge, and even his right-hand man Jey Uso.
At Crown Jewel, Roman Reigns added Brock Lesnar to his impressive list of scalps, seeing a new fold in the storyline between the two and Paul Heyman.
The build-up to their mammoth clash was excellent, calling into question the loyalty of the "wise man" stuck in the middle of past and present clients and presenting the very best of Roman's character work.
Roman Reigns has gone through a complete change of character in this run as the Tribal Chief and has put to bed the doubts expressed early in his career.
But competition at the top of the mountain wears thin and very soon we may find there aren't many legitimate challengers for Roman Reigns.
Let's take a journey into the fantasy realm and look at potential challengers standing tall outside the walls of WWE that could put Roman Reigns to the sword.
#5 Roman Reigns vs Minoru Suzuki
It only takes watching Roman Reigns in his previous battles with Brock Lesnar to realize that Roman is not one to shy away from brutal affairs.
Roman is a severely underrated brawler and sells fantastically, adding to the fighting feel of his matches.
The slow, methodical, and callous nature of Minoru Suzuki in a wrestling ring is legendary. Every match that Suzuki takes part in has an edge to it that has fans wincing with every strike.
But what makes Suzuki so great in his domain is his willingness and at times desire to take the hardest shots from his opponent.
Roman Reigns has gone head-to-head with other brawlers like Samoa Joe, Braun Strowman, Kevin Owens, Dean Ambrose (Jon Moxley), and of course, Brock Lesnar.
But what makes a Minoru Suzuki match so desirable for Roman Reigns is the sense of unknowing; nobody knows the true brutality of the Tribal Chief outside of WWE and a match fight between the two would have everyone on the edge of their seats.
#4 Roman Reigns vs Adam Scherr (FKA Braun Strowman)
Prior to his heel run there was very little to redeem the character of Roman Reigns.
One of the significant problems that arose from his push was that he had no nemesis to foil, and therefore no personal blood feuds to engage in that would get the fans backing.
Despite his SHIELD run coming to an end thanks to Seth Rollins driving a steel chair into his back, WWE never invested the time to have him in a serious feud with the traitor, instead he instantly pursued championships.
Although Brock Lesnar is thought by many to be his arch-nemesis and his greatest rival, his status as a part-time wrestler limits the weekly storyline potential between the two.
Instead, Roman Reigns' greatest and most consistent rival was Braun Strowman. Both athletes elevated each other throughout their encounters, helping each other get over by giving the WWE Universe a brutal collection of amazing matches.
No longer with WWE, Braun now operates under the name Adam Scherr, where he made a return to wrestling via Free the Narrative II: The Monster in Us All by defeating EC3. A reunion between Roman and his old foe could reignite their rivalry and push the Tribal Chief to his limits.
#3 Roman Reigns vs Tama Tonga
Under his Tribal Chief character, Roman Reigns has evolved into one of the best talkers in the business.
He has established himself top of the foodchain in WWE and positioned himself as the patriarch of the Anoa'i wrestling family.
While Roman Reigns rules the SmackDown roster, proudly boasting his Samoan heritage, there is yet another who carries Pacific Islander heritage into their wrestling.
Tama Tonga has earned a reputation for being one of the baddest fighters in New Japan Pro Wrestling, alongside his brother Tanga Loa and cousin Bad Luck Fale.
The nephew of professional wrestling legend Haku is best known as an OG member of the international faction Bullet Club, where he has always served as an enforcer to the leader while they pursue championship gold.
Tama has found the best of his success while teaming with Tanga Loa as the Guerrillas of Destiny.
But he has been a constant pest to Roman Reigns on Twitter, building and sustaining an online feud that has fans calling for the two to one day square off in the ring.
Tama Tonga has everything to gain in a match with Roman Reigns, and you could be mistaken for believing Roman has nothing to gain from their feud. But, given the importance of the Tribal Chief gimmick and the fact that Tama Tonga represents the island of Tonga and Roman Reigns represents Samoa, it gives the match a sporting edge.
Tonga and Samoa have a contentious yet respectful rivalry in sports, with their most high-profile clashes coming in Rugby League. The Head of the Table will need to answer the inter-tribe challenge should they both find themselves on the same 'island'.
#2 Roman Reigns & Jon Moxley vs Guerrillas of Destiny - SHIELD vs Bullet Club
Two-thirds of one of the most dominant factions in WWE history, Roman Reigns and Jon Moxley, remained allies for the majority of their time in the same promotion.
The dissolution of the SHIELD saw them both pursue different aspirations. But they always remained close by and called upon each other as "brothers" whenever they stood opposite a common enemy.
Moxley has since departed WWE and helped build AEW into the pro wrestling powerhouse it has become. And should Roman, too, ever find himself outside the walls of WWE, we may well see their next reunion. A common enemy is the only catalyst needed to bring about the SHIELD reunion.
Enter the duo of Tama Tonga and Tanga Loa. The Guerrillas of Destiny have dominated the tag team landscape of NJPW and captured championships internationally.
But their claim to fame is their deep-rooted allegiance to Bullet Club. Bullet Club is the largest faction outside of WWE, boasting high-level members and alumni, and winning championships wherever they have gone. They went against the grain in NJPW, using unorthodox means to win by any means necessary.
In many ways, Bullet Club and SHIELD are cut from the same cloth. The SHIELD ran through the roster in a very similar way to Bullet Club and took championships by any means necessary just like their New Japan counterpart. Bullet Club and SHIELD also share the fact they both evolved from hatred and ire to admiration and respect.
Bullet Club vs SHIELD is a tale of two factions operating with the same mantra and poise. Jon Moxley and Roman Reigns reuniting against the Guerrillas of Destiny would be the ultimate battle with both parties flying the flag for the stables that propelled them.
#1 Roman Reigns vs Jacob Fatu
While Roman Reigns exerts confidence as the self-proclaimed "Head of the Table", leading his Bloodline faction with Jimmy and Jey Uso, there is a shadow that lurks behind him.
Roman Reigns has long been touted for a clash with his cousin, The Rock, for years and as such fans are quick to point out that he would be the perfect challenge for the patriarch of the Anoa'i family. But staring across the boundary is his other cousin, Jacob Fatu.
Roman Reigns has been dominant in the WWE, holding the Universal Championship over 400 days and beating every challenger with conviction. Jacob Fatu, on the other hand, had a stranglehold over the MLW World Heavyweight Championship, dominating his competition for over 800 days before dropping the belt to Alex Hammerstone.
While they are both great in-ring workers capable of delivering brutal and hard-hitting affairs when they are ready, their clash is a dream for the story alone. Roman Reigns has beaten both of his cousins, Jey and Jimmy, into submission and servitude and claims he is the bread winner of the family.
And while The Rock is by far the biggest name that can challenge the Universal Champion, he is not a full-time athlete and as a result holds very little claim to the throne.
Jacob Fatu, meanwhile, has been dominant and callous in his run with MLW, and as a full-time athlete he holds a legitimate claim to being the true Head of the Table in wrestling.
We are currently seeing the effects of good storytelling between Roman Reigns and Brock Lesnar thanks to their common denominator, Paul Heyman. The heart of their storyline is the question hanging over Heyman's loyalty and who he stands with.
The same can be said and done with a potential feud between Jacob Fatu and Roman Reigns. The Bloodline's structural integrity would be tested to breaking point due to the arrival of another cousin. If Roman Reigns is insecure as to whether or not he can trust Paul Heyman right now, imagine the character work we can bear witness to when the Usos' allegiances are tested.