But some boxing fans - including former undisputed world heavyweight champion Lewis - will not be...
This is a gimmick fight, but it's a gimmick involving one of the best boxers ever and arguably the most entertaining personality in combat sports.
McGregor and Mayweather will square off in a 12-round boxing match at T-Mobile Arena in Las Vegas, NV.
"Floyd will stop him".
McGregor, the lightweight UFC Champion, will fight under boxing rules, despite never having had an officially sanctioned bout under those rules.
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"I wouldn't buy it-but I would be interested in the result". And based on what I've seen he's not going to phone it in, he's going to put it all out there.
Who will win the August 26th date?
Mayweather makes a comeback nearly two years after defeating Andre Berto in September 2015 on the back of equalling Rocky Marciano's 49-0 retirement record.
But unlike those two, Lewis doesn't feel the novelty matchup will hurt boxing's image. "I love Bruce Lee and the other disciplines and when he fought against other fighters, you wanted to see the differences, so I can see the appeal", Lewis said.
Conor McGregor is known to walk the walk and talk the talk, but this time it's his striking coach doing all the talking and predicting something big to happen during the mega-fight between him and Floyd Mayweather.