Social media has erupted over claims that Conor McGregor could be exploring a blockbuster rematch with Khabib Nurmagomedov through a potential sponsorship deal involving Rainbet.
The rumor has quickly spread across MMA pages, with several posts alleging that Rainbet could help finance a fight worth as much as $500 million. Other versions of the story describe it as a $100 million payday or one of the largest fighter payouts in combat-sports history.
However, there is one major detail fans should understand before treating the matchup as real:
Nothing has been officially announced.
What is being claimed?
The viral posts allege that McGregor is involved in discussions with Rainbet over a potential fight against Nurmagomedov.
The exact financial details are inconsistent.
Some posts describe a $500 million event. Others focus on a possible $100 million payout, without explaining whether that number refers to one fighter, both fighters combined, sponsorship funding, total event revenue, or something else entirely.
No verified contract, venue, promoter, date, athletic commission filing, or official ruleset has been revealed.
That makes this a developing social-media rumor rather than a confirmed fight announcement.
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Their first fight remains one of MMA’s defining rivalries
McGregor and Nurmagomedov finally met at UFC 229 in Las Vegas on October 6, 2018.
Nurmagomedov controlled much of the contest and defeated McGregor by submission in the fourth round, successfully defending the UFC lightweight championship.
The fight did not end when the submission was recorded. A chaotic confrontation broke out immediately afterward, adding another chapter to a rivalry that had already become deeply personal.
Years later, fans still debate the possibility of a rematch.
The combination of McGregor’s global profile, Khabib’s undefeated career and the hostility surrounding their original meeting means that even an unverified rematch claim can spread rapidly.
The biggest obstacle is Khabib’s retirement
A potential sponsorship package would not solve the most important problem: Nurmagomedov is retired.
Khabib walked away from professional MMA with an undefeated 29-0 record following his victory over Justin Gaethje. The UFC later formally recognized his retirement.
Since leaving active competition, he has repeatedly appeared more interested in coaching and supporting other fighters than rebuilding his own fighting career.
For this rematch to happen, Nurmagomedov would need to reverse one of the clearest retirement decisions made by a major modern MMA champion.
Money alone does not guarantee that.
Why the rumor became so believable
The claim works because McGregor and Khabib remain permanently connected in the minds of MMA fans.
Their rivalry had everything required to become a global spectacle:
- elite-level competition - championship stakes - national and cultural tension - personal hostility - mainstream attention - an unforgettable ending
A rematch would immediately attract interest beyond normal UFC audiences.
It would also fit the modern combat-sports market, where traditional promotions, streaming platforms, sponsors, influencers and betting brands increasingly compete for attention through unusual crossover events and enormous financial claims.
For another recent crossover-fighting story, read Tommy Fury Beats Eddie Hall by Majority Decision.
The money claims require serious caution
The largest warning sign is the lack of a clear explanation behind the reported figures.
Calling something a “$500 million fight” does not necessarily mean the fighters would split $500 million. That number could theoretically refer to estimated event value, sponsorship funding, projected revenue or simply an unsupported promotional figure.
The circulating posts do not provide that breakdown.
There has also been no public confirmation explaining Rainbet’s alleged role. Sponsoring an event, promoting a fighter and directly financing an entire fight are very different arrangements.
Until financial documents or official statements appear, both the $500 million figure and the suggested $100 million payout should be treated as speculation.
What would need to happen next?
Several major developments would be required before this could be considered a real fight:
- McGregor or his representatives would need to confirm negotiations. 2. Nurmagomedov would need to publicly agree to return. 3. Rainbet would need to clarify whether it is actually involved. 4. A promoter and broadcast partner would need to be identified. 5. The fighters would need to agree on weight, rules and contract terms. 6. A venue and athletic commission would need to approve the event.
Without those steps, there is no confirmed fight.
Could it happen outside the UFC?
That remains another unanswered question.
McGregor and Nurmagomedov built their rivalry inside the UFC, but the viral posts do not explain whether the rumored contest would be a UFC bout, an exhibition, a boxing match or an independently promoted MMA event.
Each option would create different contractual and regulatory challenges.
A UFC rematch would require the promotion’s involvement. An independent event could introduce questions surrounding fighter contracts, licensing, medical requirements, broadcasting and ownership of promotional rights.
The complete absence of those details is another reason not to present the rumor as confirmed.
The bottom line
McGregor versus Khabib remains one of the few combat-sports rematches capable of taking over the entire internet before it is even announced.
That explains why the Rainbet story has spread so quickly.
But at this stage, it is still only a rumor built around repeated social-media posts and extraordinary financial claims.
There is no confirmed agreement, no announced date and no evidence that Nurmagomedov has agreed to leave retirement.
Until one of the fighters, an official promoter or Rainbet publicly confirms the negotiations, fans should treat the proposed megafight as speculation rather than a scheduled event.
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